diff --git a/packages/react-native/React/Fabric/Mounting/ComponentViews/ScrollView/RCTScrollViewComponentView.mm b/packages/react-native/React/Fabric/Mounting/ComponentViews/ScrollView/RCTScrollViewComponentView.mm
index 00653abc9fd0..3853ea796772 100644
--- a/packages/react-native/React/Fabric/Mounting/ComponentViews/ScrollView/RCTScrollViewComponentView.mm
+++ b/packages/react-native/React/Fabric/Mounting/ComponentViews/ScrollView/RCTScrollViewComponentView.mm
@@ -412,7 +412,8 @@ - (void)updateProps:(const Props::Shared &)props oldProps:(const Props::Shared &
 
   auto *scrollView = (RCTEnhancedScrollView *)_scrollView;
   if (oldScrollViewProps.snapToAlignment != newScrollViewProps.snapToAlignment) {
-    scrollView.snapToAlignment = RCTNSStringFromString(toString(newScrollViewProps.snapToAlignment));
+    scrollView.snapToAlignment =
+        RCTNSStringFromString(toString(newScrollViewProps.snapToAlignment.value_or(ScrollViewSnapToAlignment::Start)));
   }
 
   scrollView.snapToStart = newScrollViewProps.snapToStart;
diff --git a/packages/react-native/React/Fabric/Mounting/ComponentViews/View/RCTViewComponentView.mm b/packages/react-native/React/Fabric/Mounting/ComponentViews/View/RCTViewComponentView.mm
index bdd0bb5af232..8a074cd2b604 100644
--- a/packages/react-native/React/Fabric/Mounting/ComponentViews/View/RCTViewComponentView.mm
+++ b/packages/react-native/React/Fabric/Mounting/ComponentViews/View/RCTViewComponentView.mm
@@ -67,7 +67,7 @@ static BOOL RCTViewIsInteractiveAccessibilityElement(UIView *view, const ViewPro
 
   // `role` wins over the legacy `accessibilityRole` when both are set, matching
   // how the traits themselves are resolved.
-  if (props.role != Role::None) {
+  if (props.role.value_or(Role::None) != Role::None) {
     static const std::unordered_set<Role> interactiveRoles{
         Role::Button,
         Role::Checkbox,
@@ -82,7 +82,7 @@ static BOOL RCTViewIsInteractiveAccessibilityElement(UIView *view, const ViewPro
         Role::Switch,
         Role::Tab,
         Role::Treeitem};
-    return interactiveRoles.contains(props.role);
+    return interactiveRoles.contains(*props.role);
   }
 
   static const std::unordered_set<std::string_view> interactiveAccessibilityRoles{
@@ -1690,8 +1690,9 @@ - (NSString *)accessibilityValue
   }
 
   NSMutableArray *valueComponents = [NSMutableArray new];
-  NSString *roleString = (props.role != Role::None) ? [NSString stringWithUTF8String:toString(props.role).c_str()]
-                                                    : [NSString stringWithUTF8String:props.accessibilityRole.c_str()];
+  NSString *roleString = (props.role.value_or(Role::None) != Role::None)
+      ? [NSString stringWithUTF8String:toString(*props.role).c_str()]
+      : [NSString stringWithUTF8String:props.accessibilityRole.c_str()];
 
   // In iOS, checkbox and radio buttons aren't recognized as traits. However,
   // because our apps use checkbox and radio buttons often, we should announce
diff --git a/packages/react-native/ReactCommon/react/renderer/components/scrollview/BaseScrollViewProps.cpp b/packages/react-native/ReactCommon/react/renderer/components/scrollview/BaseScrollViewProps.cpp
index cb5407ea853e..5b6f28634352 100644
--- a/packages/react-native/ReactCommon/react/renderer/components/scrollview/BaseScrollViewProps.cpp
+++ b/packages/react-native/ReactCommon/react/renderer/components/scrollview/BaseScrollViewProps.cpp
@@ -80,7 +80,7 @@ BaseScrollViewProps::BaseScrollViewProps(
           rawProps,
           "decelerationRate",
           sourceProps.decelerationRate,
-          (Float)0.998)),
+          kDefaultDecelerationRate)),
       endDraggingSensitivityMultiplier(convertRawProp(
           context,
           rawProps,
@@ -427,10 +427,7 @@ SharedDebugStringConvertibleList BaseScrollViewProps::getDebugProps() const {
               "snapToInterval",
               snapToInterval,
               defaultScrollViewProps.snapToInterval),
-          debugStringConvertibleItem(
-              "snapToAlignment",
-              snapToAlignment,
-              defaultScrollViewProps.snapToAlignment),
+          debugStringConvertibleItem("snapToAlignment", snapToAlignment),
           debugStringConvertibleItem(
               "disableIntervalMomentum",
               disableIntervalMomentum,
diff --git a/packages/react-native/ReactCommon/react/renderer/components/scrollview/BaseScrollViewProps.h b/packages/react-native/ReactCommon/react/renderer/components/scrollview/BaseScrollViewProps.h
index 3a3ebbe84b9b..4e4b5d447852 100644
--- a/packages/react-native/ReactCommon/react/renderer/components/scrollview/BaseScrollViewProps.h
+++ b/packages/react-native/ReactCommon/react/renderer/components/scrollview/BaseScrollViewProps.h
@@ -41,7 +41,13 @@ class BaseScrollViewProps : public ViewProps {
   bool automaticallyAdjustContentInsets{};
   bool automaticallyAdjustsScrollIndicatorInsets{true};
   bool automaticallyAdjustKeyboardInsets{false};
-  Float decelerationRate{0.998f};
+#ifdef ANDROID
+  // ReactScrollView's initial rate.
+  static constexpr Float kDefaultDecelerationRate = 0.985f;
+#else
+  static constexpr Float kDefaultDecelerationRate = 0.998f;
+#endif
+  Float decelerationRate{kDefaultDecelerationRate};
   Float endDraggingSensitivityMultiplier{1};
   bool directionalLockEnabled{};
   ScrollViewIndicatorStyle indicatorStyle{};
@@ -63,7 +69,7 @@ class BaseScrollViewProps : public ViewProps {
   Point contentOffset{};
   EdgeInsets scrollIndicatorInsets{};
   Float snapToInterval{};
-  ScrollViewSnapToAlignment snapToAlignment{};
+  std::optional<ScrollViewSnapToAlignment> snapToAlignment{};
   bool disableIntervalMomentum{false};
   std::vector<Float> snapToOffsets{};
   bool snapToStart{true};
diff --git a/packages/react-native/ReactCommon/react/renderer/components/scrollview/platform/android/react/renderer/components/scrollview/HostPlatformScrollViewProps.cpp b/packages/react-native/ReactCommon/react/renderer/components/scrollview/platform/android/react/renderer/components/scrollview/HostPlatformScrollViewProps.cpp
index a9a83ef67db1..2aa02d73854c 100644
--- a/packages/react-native/ReactCommon/react/renderer/components/scrollview/platform/android/react/renderer/components/scrollview/HostPlatformScrollViewProps.cpp
+++ b/packages/react-native/ReactCommon/react/renderer/components/scrollview/platform/android/react/renderer/components/scrollview/HostPlatformScrollViewProps.cpp
@@ -49,7 +49,13 @@ HostPlatformScrollViewProps::HostPlatformScrollViewProps(
           rawProps,
           "endFillColor",
           sourceProps.endFillColor,
-          clearColor())) {}
+          clearColor())),
+      scrollsChildToFocus(convertRawProp(
+          context,
+          rawProps,
+          "scrollsChildToFocus",
+          sourceProps.scrollsChildToFocus,
+          true)) {}
 
 void HostPlatformScrollViewProps::setProp(
     const PropsParserContext& context,
@@ -69,6 +75,7 @@ void HostPlatformScrollViewProps::setProp(
     RAW_SET_PROP_SWITCH_CASE_BASIC(fadingEdgeLength);
     RAW_SET_PROP_SWITCH_CASE_BASIC(overScrollMode);
     RAW_SET_PROP_SWITCH_CASE_BASIC(endFillColor);
+    RAW_SET_PROP_SWITCH_CASE_BASIC(scrollsChildToFocus);
   }
 }
 
@@ -96,7 +103,11 @@ SharedDebugStringConvertibleList HostPlatformScrollViewProps::getDebugProps()
           debugStringConvertibleItem(
               "endFillColor",
               endFillColor,
-              defaultScrollViewProps.endFillColor)};
+              defaultScrollViewProps.endFillColor),
+          debugStringConvertibleItem(
+              "scrollsChildToFocus",
+              scrollsChildToFocus,
+              defaultScrollViewProps.scrollsChildToFocus)};
 }
 #endif
 
@@ -301,17 +312,9 @@ folly::dynamic HostPlatformScrollViewProps::getDiffProps(
   }
 
   if (snapToAlignment != oldProps->snapToAlignment) {
-    switch (snapToAlignment) {
-      case ScrollViewSnapToAlignment::Start:
-        result["snapToAlignment"] = "start";
-        break;
-      case ScrollViewSnapToAlignment::Center:
-        result["snapToAlignment"] = "center";
-        break;
-      case ScrollViewSnapToAlignment::End:
-        result["snapToAlignment"] = "end";
-        break;
-    }
+    result["snapToAlignment"] = snapToAlignment.has_value()
+        ? toString(*snapToAlignment)
+        : folly::dynamic(nullptr);
   }
 
   if (disableIntervalMomentum != oldProps->disableIntervalMomentum) {
@@ -380,6 +383,10 @@ folly::dynamic HostPlatformScrollViewProps::getDiffProps(
     result["endFillColor"] = *endFillColor;
   }
 
+  if (scrollsChildToFocus != oldProps->scrollsChildToFocus) {
+    result["scrollsChildToFocus"] = scrollsChildToFocus;
+  }
+
   return result;
 }
 
diff --git a/packages/react-native/ReactCommon/react/renderer/components/scrollview/platform/android/react/renderer/components/scrollview/HostPlatformScrollViewProps.h b/packages/react-native/ReactCommon/react/renderer/components/scrollview/platform/android/react/renderer/components/scrollview/HostPlatformScrollViewProps.h
index 7ac321ec89fd..49fcc1cb7f7f 100644
--- a/packages/react-native/ReactCommon/react/renderer/components/scrollview/platform/android/react/renderer/components/scrollview/HostPlatformScrollViewProps.h
+++ b/packages/react-native/ReactCommon/react/renderer/components/scrollview/platform/android/react/renderer/components/scrollview/HostPlatformScrollViewProps.h
@@ -38,6 +38,7 @@ class HostPlatformScrollViewProps : public BaseScrollViewProps {
   folly::dynamic fadingEdgeLength{};
   std::string overScrollMode{"auto"};
   SharedColor endFillColor{clearColor()};
+  bool scrollsChildToFocus{true};
 
 #pragma mark - DebugStringConvertible
 
diff --git a/packages/react-native/ReactCommon/react/renderer/components/scrollview/tests/ScrollViewPropsDiffTest.cpp b/packages/react-native/ReactCommon/react/renderer/components/scrollview/tests/ScrollViewPropsDiffTest.cpp
new file mode 100644
index 000000000000..8c46c2b2db88
--- /dev/null
+++ b/packages/react-native/ReactCommon/react/renderer/components/scrollview/tests/ScrollViewPropsDiffTest.cpp
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#include <gtest/gtest.h>
+
+#include <react/renderer/components/scrollview/ScrollViewProps.h>
+#include <react/test_utils/PropsPayloads.h>
+
+#ifdef RN_SERIALIZABLE_STATE
+
+namespace facebook::react {
+
+namespace {
+
+using folly::dynamic;
+
+void expectPayloads(const std::vector<PropsCommit>& commits) {
+  expectPayloadsMatchRawProps<ScrollViewProps>(commits);
+}
+
+} // namespace
+
+// ReactScrollViewManager has a setter for it; with
+// enableExclusivePropsUpdateAndroid there is no rawProps fallback.
+TEST(ScrollViewPropsDiffTest, emitsScrollsChildToFocus) {
+  expectPayloads({{dynamic::object("scrollsChildToFocus", false)}});
+}
+
+// Android ScrollViews start with snapping alignment disabled, and
+// setSnapToAlignment disables it for null.
+TEST(
+    ScrollViewPropsDiffTest,
+    keepsAnExplicitSnapToAlignmentStartApartFromUnset) {
+  expectPayloads({
+      {dynamic::object("snapToAlignment", "start")},
+      {dynamic::object("snapToAlignment", "center")},
+      {dynamic::object("snapToAlignment", nullptr)},
+  });
+}
+
+// Android ScrollViews start decelerating at 0.985 (ReactScrollViewHelper).
+// A removed rate restores it; Props 1.5 sends null, which the setter reads as
+// 0.
+TEST(ScrollViewPropsDiffTest, emitsAnExplicitDecelerationRate) {
+  expectPayloads({
+      {dynamic::object("decelerationRate", 0.998)},
+      {dynamic::object("decelerationRate", nullptr),
+       dynamic::object("decelerationRate", 0.985)},
+  });
+}
+
+// The ScrollView managers turn both off for null.
+TEST(ScrollViewPropsDiffTest, removingNestedScrollAndMomentumEventsEmitsFalse) {
+  expectPayloads({
+      {dynamic::object("nestedScrollEnabled", true)(
+          "sendMomentumEvents", true)},
+      {dynamic::object("nestedScrollEnabled", nullptr)(
+           "sendMomentumEvents", nullptr),
+       dynamic::object("nestedScrollEnabled", false)(
+           "sendMomentumEvents", false)},
+  });
+}
+
+} // namespace facebook::react
+
+#endif
diff --git a/packages/react-native/ReactCommon/react/renderer/components/text/BaseTextProps.cpp b/packages/react-native/ReactCommon/react/renderer/components/text/BaseTextProps.cpp
index 135463aa2d09..407445b5a6b2 100644
--- a/packages/react-native/ReactCommon/react/renderer/components/text/BaseTextProps.cpp
+++ b/packages/react-native/ReactCommon/react/renderer/components/text/BaseTextProps.cpp
@@ -13,6 +13,8 @@
 #include <react/renderer/debug/DebugStringConvertibleItem.h>
 #include <react/utils/FloatComparison.h>
 
+#include <cmath>
+
 namespace facebook::react {
 
 static TextAttributes convertRawProp(
@@ -436,7 +438,9 @@ void BaseTextProps::appendTextAttributesProps(
   if (!floatEquality(
           textAttributes.letterSpacing,
           oldProps->textAttributes.letterSpacing)) {
-    result["letterSpacing"] = textAttributes.letterSpacing;
+    result["letterSpacing"] = std::isnan(textAttributes.letterSpacing)
+        ? folly::dynamic(nullptr)
+        : textAttributes.letterSpacing;
   }
 
   if (textAttributes.textTransform != oldProps->textAttributes.textTransform) {
diff --git a/packages/react-native/ReactCommon/react/renderer/components/text/tests/ParagraphPropsDiffTest.cpp b/packages/react-native/ReactCommon/react/renderer/components/text/tests/ParagraphPropsDiffTest.cpp
new file mode 100644
index 000000000000..96ede0ca8e10
--- /dev/null
+++ b/packages/react-native/ReactCommon/react/renderer/components/text/tests/ParagraphPropsDiffTest.cpp
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#include <gtest/gtest.h>
+
+#include <react/renderer/components/text/ParagraphProps.h>
+#include <react/test_utils/PropsPayloads.h>
+
+#ifdef RN_SERIALIZABLE_STATE
+
+namespace facebook::react {
+
+using folly::dynamic;
+
+// ReactTextViewManager resets letterSpacing to 0 for null;
+// ReactTextView.setLetterSpacing ignores NaN.
+TEST(ParagraphPropsDiffTest, removingLetterSpacingEmitsNull) {
+  expectPayloadsMatchRawProps<ParagraphProps>({
+      {dynamic::object("letterSpacing", 4.0)},
+      {dynamic::object("letterSpacing", nullptr)},
+  });
+}
+
+} // namespace facebook::react
+
+#endif
diff --git a/packages/react-native/ReactCommon/react/renderer/components/view/AccessibilityProps.cpp b/packages/react-native/ReactCommon/react/renderer/components/view/AccessibilityProps.cpp
index b204a3fd3c58..4bc58608d2a2 100644
--- a/packages/react-native/ReactCommon/react/renderer/components/view/AccessibilityProps.cpp
+++ b/packages/react-native/ReactCommon/react/renderer/components/view/AccessibilityProps.cpp
@@ -18,12 +18,12 @@ namespace facebook::react {
 // members. This makes accessibilityTraits the single source of truth.
 // See: github.com/facebook/react-native/issues/57515
 static AccessibilityTraits deriveAccessibilityTraits(
-    Role role,
+    std::optional<Role> role,
     const std::string& accessibilityRole,
     const std::optional<AccessibilityState>& accessibilityState) {
   AccessibilityTraits traits = AccessibilityTraits::None;
-  if (role != Role::None) {
-    fromString(toString(role), traits);
+  if (role.value_or(Role::None) != Role::None) {
+    fromString(toString(*role), traits);
   } else if (!accessibilityRole.empty()) {
     fromString(accessibilityRole, traits);
   }
@@ -179,16 +179,15 @@ AccessibilityProps::AccessibilityProps(
   auto* accessibilityRoleValue = rawProps.at("accessibilityRole");
   auto* roleValue = rawProps.at("role");
 
-  if (accessibilityRoleValue == nullptr ||
-      !accessibilityRoleValue->hasValue()) {
+  if (accessibilityRoleValue == nullptr) {
     accessibilityRole = sourceProps.accessibilityRole;
-  } else {
+  } else if (accessibilityRoleValue->hasValue()) {
     fromRawValue(context, *accessibilityRoleValue, accessibilityRole);
   }
 
-  if (roleValue == nullptr || !roleValue->hasValue()) {
+  if (roleValue == nullptr) {
     role = sourceProps.role;
-  } else {
+  } else if (roleValue->hasValue()) {
     fromRawValue(context, *roleValue, role);
   }
 
diff --git a/packages/react-native/ReactCommon/react/renderer/components/view/AccessibilityProps.h b/packages/react-native/ReactCommon/react/renderer/components/view/AccessibilityProps.h
index 53524bb4a015..0b055d60f9b8 100644
--- a/packages/react-native/ReactCommon/react/renderer/components/view/AccessibilityProps.h
+++ b/packages/react-native/ReactCommon/react/renderer/components/view/AccessibilityProps.h
@@ -56,7 +56,7 @@ class AccessibilityProps {
   bool onAccessibilityEscape{};
   bool onAccessibilityAction{};
   ImportantForAccessibility importantForAccessibility{ImportantForAccessibility::Auto};
-  Role role{Role::None};
+  std::optional<Role> role{};
   std::string testId;
 
 #pragma mark - DebugStringConvertible
diff --git a/packages/react-native/ReactCommon/react/renderer/components/view/platform/android/react/renderer/components/view/HostPlatformViewProps.cpp b/packages/react-native/ReactCommon/react/renderer/components/view/platform/android/react/renderer/components/view/HostPlatformViewProps.cpp
index d2417698a5f6..2f2820422161 100644
--- a/packages/react-native/ReactCommon/react/renderer/components/view/platform/android/react/renderer/components/view/HostPlatformViewProps.cpp
+++ b/packages/react-native/ReactCommon/react/renderer/components/view/platform/android/react/renderer/components/view/HostPlatformViewProps.cpp
@@ -395,58 +395,39 @@ inline static void updateNativeDrawableProp(
   result[propName] = nativeDrawableResult;
 }
 
-inline static void updateAccessibilityStateProp(
-    folly::dynamic& result,
-    const std::optional<AccessibilityState>& newState,
-    const std::optional<AccessibilityState>& oldState) {
-  folly::dynamic resultState = folly::dynamic::object();
-
-  if (!newState.has_value() && oldState.has_value()) {
-    result["accessibilityState"] = resultState;
-    return;
-  }
+static folly::dynamic toDynamic(const AccessibilityState& state) {
+  folly::dynamic result = folly::dynamic::object();
+  result["disabled"] = state.disabled;
 
-  if (!oldState.has_value() || newState->disabled != oldState->disabled) {
-    resultState["disabled"] = newState->disabled;
+  // Omitting the key when `selected` is unset is what tells the platform the
+  // component is not selectable. BaseViewManager#setViewState falls back to
+  // `setSelected(false)` for an absent key, so the rendered result is
+  // unchanged from when this was a plain `bool`.
+  if (state.selected.has_value()) {
+    result["selected"] = state.selected.value();
   }
 
-  if (!oldState.has_value() || newState->selected != oldState->selected) {
-    // Omitting the key when `selected` is unset is what tells the platform the
-    // component is not selectable. BaseViewManager#setViewState falls back to
-    // `setSelected(false)` for an absent key, so the rendered result is
-    // unchanged from when this was a plain `bool`.
-    if (newState->selected.has_value()) {
-      resultState["selected"] = newState->selected.value();
-    }
-  }
+  result["busy"] = state.busy;
 
-  if (!oldState.has_value() || newState->busy != oldState->busy) {
-    resultState["busy"] = newState->busy;
+  if (state.expanded.has_value()) {
+    result["expanded"] = state.expanded.value();
   }
 
-  if (!oldState.has_value() || newState->expanded != oldState->expanded) {
-    if (newState->expanded.has_value()) {
-      resultState["expanded"] = newState->expanded.value();
-    }
+  switch (state.checked) {
+    case AccessibilityState::Unchecked:
+      result["checked"] = false;
+      break;
+    case AccessibilityState::Checked:
+      result["checked"] = true;
+      break;
+    case AccessibilityState::Mixed:
+      result["checked"] = "mixed";
+      break;
+    case AccessibilityState::None:
+      result["checked"] = "none";
+      break;
   }
-
-  if (!oldState.has_value() || newState->checked != oldState->checked) {
-    switch (newState->checked) {
-      case AccessibilityState::Unchecked:
-        resultState["checked"] = false;
-        break;
-      case AccessibilityState::Checked:
-        resultState["checked"] = true;
-        break;
-      case AccessibilityState::Mixed:
-        resultState["checked"] = "mixed";
-        break;
-      case AccessibilityState::None:
-        resultState["checked"] = "none";
-        break;
-    }
-  }
-  result["accessibilityState"] = resultState;
+  return result;
 }
 
 static folly::dynamic toDynamic(
@@ -540,7 +521,8 @@ folly::dynamic HostPlatformViewProps::getDiffProps(
   }
 
   if (role != oldProps->role) {
-    result["role"] = toString(role);
+    result["role"] =
+        role.has_value() ? toString(*role) : folly::dynamic(nullptr);
   }
 
   if (opacity != oldProps->opacity) {
@@ -907,8 +889,9 @@ folly::dynamic HostPlatformViewProps::getDiffProps(
   // Accessibility
 
   if (accessibilityState != oldProps->accessibilityState) {
-    updateAccessibilityStateProp(
-        result, accessibilityState, oldProps->accessibilityState);
+    result["accessibilityState"] = accessibilityState.has_value()
+        ? toDynamic(*accessibilityState)
+        : folly::dynamic::object();
   }
 
   if (accessibilityLabel != oldProps->accessibilityLabel) {
@@ -941,7 +924,9 @@ folly::dynamic HostPlatformViewProps::getDiffProps(
   }
 
   if (accessibilityRole != oldProps->accessibilityRole) {
-    result["accessibilityRole"] = accessibilityRole;
+    result["accessibilityRole"] = accessibilityRole.empty()
+        ? folly::dynamic(nullptr)
+        : folly::dynamic(accessibilityRole);
   }
 
   if (accessibilityLanguage != oldProps->accessibilityLanguage) {
@@ -962,7 +947,9 @@ folly::dynamic HostPlatformViewProps::getDiffProps(
     if (accessibilityValue.text.has_value()) {
       accessibilityValueObject["text"] = accessibilityValue.text.value();
     }
-    result["accessibilityValue"] = accessibilityValueObject;
+    result["accessibilityValue"] = accessibilityValueObject.empty()
+        ? folly::dynamic(nullptr)
+        : accessibilityValueObject;
   }
 
   if (accessibilityActions != oldProps->accessibilityActions) {
diff --git a/packages/react-native/ReactCommon/react/renderer/components/view/tests/ViewPropsDiffTest.cpp b/packages/react-native/ReactCommon/react/renderer/components/view/tests/ViewPropsDiffTest.cpp
index 0c328359c855..7fe5a6dfdab3 100644
--- a/packages/react-native/ReactCommon/react/renderer/components/view/tests/ViewPropsDiffTest.cpp
+++ b/packages/react-native/ReactCommon/react/renderer/components/view/tests/ViewPropsDiffTest.cpp
@@ -103,6 +103,55 @@ TEST(ViewPropsDiffTest, gradientColorHintEmitsNullColor) {
                       "position", nullptr)))))}});
 }
 
+// BaseViewManager.setViewState replaces the whole state: an absent `selected`
+// deselects the view and an absent `disabled` re-enables it. Props 2.0 sends an
+// unset `checked` as "none", which Java ignores.
+TEST(ViewPropsDiffTest, emitsTheWholeAccessibilityStateWhenOneMemberChanges) {
+  auto state = [](bool busy) {
+    return dynamic::object("selected", true)("disabled", true)("busy", busy);
+  };
+  auto sentState = [&](bool busy) {
+    return dynamic::object(
+        "accessibilityState", state(busy)("checked", "none"));
+  };
+  expectPayloads({
+      {dynamic::object("accessibilityState", state(false)), sentState(false)},
+      {dynamic::object("accessibilityState", state(true)), sentState(true)},
+  });
+}
+
+// React sends a removed prop as null on top of the previous props.
+// BaseViewManager clears the role only for null, and
+// AccessibilityRole.fromValue("") throws.
+TEST(ViewPropsDiffTest, removingAccessibilityRoleEmitsNull) {
+  expectPayloads({
+      {dynamic::object("accessibilityRole", "button")},
+      {dynamic::object("accessibilityRole", nullptr)},
+  });
+}
+
+// BaseViewManager falls back to accessibilityRole only for a null role.
+TEST(ViewPropsDiffTest, removingRoleEmitsNull) {
+  expectPayloads({
+      {dynamic::object("role", "button")},
+      {dynamic::object("role", nullptr)},
+  });
+}
+
+// An explicit role="none" overrides accessibilityRole.
+TEST(ViewPropsDiffTest, emitsAnExplicitRoleNone) {
+  expectPayloads(
+      {{dynamic::object("role", "none")("accessibilityRole", "button")}});
+}
+
+// BaseViewManager clears the value and the content description only for null.
+TEST(ViewPropsDiffTest, removingAccessibilityValueEmitsNull) {
+  expectPayloads({
+      {dynamic::object("accessibilityValue", dynamic::object("text", "50%"))},
+      {dynamic::object("accessibilityValue", nullptr)},
+  });
+}
+
 } // namespace facebook::react
 
 #endif
diff --git a/scripts/cxx-api/api-snapshots/ReactAndroidDebugCxx.api b/scripts/cxx-api/api-snapshots/ReactAndroidDebugCxx.api
index 6d9ac1caa787..862d04da9832 100644
--- a/scripts/cxx-api/api-snapshots/ReactAndroidDebugCxx.api
+++ b/scripts/cxx-api/api-snapshots/ReactAndroidDebugCxx.api
@@ -700,8 +700,8 @@ class facebook::react::AccessibilityProps {
   public facebook::react::AccessibilityTraits accessibilityTraits;
   public facebook::react::AccessibilityValue accessibilityValue;
   public facebook::react::ImportantForAccessibility importantForAccessibility;
-  public facebook::react::Role role;
   public std::optional<facebook::react::AccessibilityState> accessibilityState;
+  public std::optional<facebook::react::Role> role;
   public std::string accessibilityHint;
   public std::string accessibilityLabel;
   public std::string accessibilityLanguage;
diff --git a/scripts/cxx-api/api-snapshots/ReactAndroidFrameworksCxx.api b/scripts/cxx-api/api-snapshots/ReactAndroidFrameworksCxx.api
index d2b41ea569c8..83896216ad31 100644
--- a/scripts/cxx-api/api-snapshots/ReactAndroidFrameworksCxx.api
+++ b/scripts/cxx-api/api-snapshots/ReactAndroidFrameworksCxx.api
@@ -1016,8 +1016,8 @@ class facebook::react::AccessibilityProps {
   public facebook::react::AccessibilityTraits accessibilityTraits;
   public facebook::react::AccessibilityValue accessibilityValue;
   public facebook::react::ImportantForAccessibility importantForAccessibility;
-  public facebook::react::Role role;
   public std::optional<facebook::react::AccessibilityState> accessibilityState;
+  public std::optional<facebook::react::Role> role;
   public std::string accessibilityHint;
   public std::string accessibilityLabel;
   public std::string accessibilityLanguage;
@@ -1439,8 +1439,9 @@ class facebook::react::BaseScrollViewProps : public facebook::react::HostPlatfor
   public facebook::react::Point contentOffset;
   public facebook::react::ScrollViewIndicatorStyle indicatorStyle;
   public facebook::react::ScrollViewKeyboardDismissMode keyboardDismissMode;
-  public facebook::react::ScrollViewSnapToAlignment snapToAlignment;
+  public static constexpr facebook::react::Float kDefaultDecelerationRate;
   public std::optional<facebook::react::ScrollViewMaintainVisibleContentPosition> maintainVisibleContentPosition;
+  public std::optional<facebook::react::ScrollViewSnapToAlignment> snapToAlignment;
   public std::vector<facebook::react::Float> snapToOffsets;
   public void setProp(const facebook::react::PropsParserContext& context, facebook::react::RawPropsPropNameHash hash, const char* propName, const facebook::react::RawValue& value);
 }
@@ -2049,6 +2050,7 @@ class facebook::react::HostPlatformScrollViewProps : public facebook::react::Bas
   public HostPlatformScrollViewProps() = default;
   public HostPlatformScrollViewProps(const facebook::react::PropsParserContext& context, const facebook::react::HostPlatformScrollViewProps& sourceProps, const facebook::react::RawProps& rawProps);
   public bool nestedScrollEnabled;
+  public bool scrollsChildToFocus;
   public bool sendMomentumEvents;
   public facebook::react::SharedColor endFillColor;
   public folly::dynamic fadingEdgeLength;
diff --git a/scripts/cxx-api/api-snapshots/ReactAndroidNewarchCxx.api b/scripts/cxx-api/api-snapshots/ReactAndroidNewarchCxx.api
index 57f7bc098311..97365fcd71a0 100644
--- a/scripts/cxx-api/api-snapshots/ReactAndroidNewarchCxx.api
+++ b/scripts/cxx-api/api-snapshots/ReactAndroidNewarchCxx.api
@@ -700,8 +700,8 @@ class facebook::react::AccessibilityProps {
   public facebook::react::AccessibilityTraits accessibilityTraits;
   public facebook::react::AccessibilityValue accessibilityValue;
   public facebook::react::ImportantForAccessibility importantForAccessibility;
-  public facebook::react::Role role;
   public std::optional<facebook::react::AccessibilityState> accessibilityState;
+  public std::optional<facebook::react::Role> role;
   public std::string accessibilityHint;
   public std::string accessibilityLabel;
   public std::string accessibilityLanguage;
diff --git a/scripts/cxx-api/api-snapshots/ReactAndroidReleaseCxx.api b/scripts/cxx-api/api-snapshots/ReactAndroidReleaseCxx.api
index 57f7bc098311..97365fcd71a0 100644
--- a/scripts/cxx-api/api-snapshots/ReactAndroidReleaseCxx.api
+++ b/scripts/cxx-api/api-snapshots/ReactAndroidReleaseCxx.api
@@ -700,8 +700,8 @@ class facebook::react::AccessibilityProps {
   public facebook::react::AccessibilityTraits accessibilityTraits;
   public facebook::react::AccessibilityValue accessibilityValue;
   public facebook::react::ImportantForAccessibility importantForAccessibility;
-  public facebook::react::Role role;
   public std::optional<facebook::react::AccessibilityState> accessibilityState;
+  public std::optional<facebook::react::Role> role;
   public std::string accessibilityHint;
   public std::string accessibilityLabel;
   public std::string accessibilityLanguage;
diff --git a/scripts/cxx-api/api-snapshots/ReactAppleDebugCxx.api b/scripts/cxx-api/api-snapshots/ReactAppleDebugCxx.api
index 863038207ad0..3852766f9a17 100644
--- a/scripts/cxx-api/api-snapshots/ReactAppleDebugCxx.api
+++ b/scripts/cxx-api/api-snapshots/ReactAppleDebugCxx.api
@@ -3435,8 +3435,8 @@ class facebook::react::AccessibilityProps {
   public facebook::react::AccessibilityTraits accessibilityTraits;
   public facebook::react::AccessibilityValue accessibilityValue;
   public facebook::react::ImportantForAccessibility importantForAccessibility;
-  public facebook::react::Role role;
   public std::optional<facebook::react::AccessibilityState> accessibilityState;
+  public std::optional<facebook::react::Role> role;
   public std::string accessibilityHint;
   public std::string accessibilityLabel;
   public std::string accessibilityLanguage;
diff --git a/scripts/cxx-api/api-snapshots/ReactAppleFrameworksCxx.api b/scripts/cxx-api/api-snapshots/ReactAppleFrameworksCxx.api
index dece37c06a37..eb53f3f42a58 100644
--- a/scripts/cxx-api/api-snapshots/ReactAppleFrameworksCxx.api
+++ b/scripts/cxx-api/api-snapshots/ReactAppleFrameworksCxx.api
@@ -3794,8 +3794,8 @@ class facebook::react::AccessibilityProps {
   public facebook::react::AccessibilityTraits accessibilityTraits;
   public facebook::react::AccessibilityValue accessibilityValue;
   public facebook::react::ImportantForAccessibility importantForAccessibility;
-  public facebook::react::Role role;
   public std::optional<facebook::react::AccessibilityState> accessibilityState;
+  public std::optional<facebook::react::Role> role;
   public std::string accessibilityHint;
   public std::string accessibilityLabel;
   public std::string accessibilityLanguage;
@@ -4029,8 +4029,9 @@ class facebook::react::BaseScrollViewProps : public facebook::react::HostPlatfor
   public facebook::react::Point contentOffset;
   public facebook::react::ScrollViewIndicatorStyle indicatorStyle;
   public facebook::react::ScrollViewKeyboardDismissMode keyboardDismissMode;
-  public facebook::react::ScrollViewSnapToAlignment snapToAlignment;
+  public static constexpr facebook::react::Float kDefaultDecelerationRate;
   public std::optional<facebook::react::ScrollViewMaintainVisibleContentPosition> maintainVisibleContentPosition;
+  public std::optional<facebook::react::ScrollViewSnapToAlignment> snapToAlignment;
   public std::vector<facebook::react::Float> snapToOffsets;
   public void setProp(const facebook::react::PropsParserContext& context, facebook::react::RawPropsPropNameHash hash, const char* propName, const facebook::react::RawValue& value);
 }
diff --git a/scripts/cxx-api/api-snapshots/ReactAppleNewarchCxx.api b/scripts/cxx-api/api-snapshots/ReactAppleNewarchCxx.api
index 3e9a7b4744fc..a1f8d4990257 100644
--- a/scripts/cxx-api/api-snapshots/ReactAppleNewarchCxx.api
+++ b/scripts/cxx-api/api-snapshots/ReactAppleNewarchCxx.api
@@ -3427,8 +3427,8 @@ class facebook::react::AccessibilityProps {
   public facebook::react::AccessibilityTraits accessibilityTraits;
   public facebook::react::AccessibilityValue accessibilityValue;
   public facebook::react::ImportantForAccessibility importantForAccessibility;
-  public facebook::react::Role role;
   public std::optional<facebook::react::AccessibilityState> accessibilityState;
+  public std::optional<facebook::react::Role> role;
   public std::string accessibilityHint;
   public std::string accessibilityLabel;
   public std::string accessibilityLanguage;
diff --git a/scripts/cxx-api/api-snapshots/ReactAppleReleaseCxx.api b/scripts/cxx-api/api-snapshots/ReactAppleReleaseCxx.api
index a692b6489f17..d3bfac82c603 100644
--- a/scripts/cxx-api/api-snapshots/ReactAppleReleaseCxx.api
+++ b/scripts/cxx-api/api-snapshots/ReactAppleReleaseCxx.api
@@ -3435,8 +3435,8 @@ class facebook::react::AccessibilityProps {
   public facebook::react::AccessibilityTraits accessibilityTraits;
   public facebook::react::AccessibilityValue accessibilityValue;
   public facebook::react::ImportantForAccessibility importantForAccessibility;
-  public facebook::react::Role role;
   public std::optional<facebook::react::AccessibilityState> accessibilityState;
+  public std::optional<facebook::react::Role> role;
   public std::string accessibilityHint;
   public std::string accessibilityLabel;
   public std::string accessibilityLanguage;
diff --git a/scripts/cxx-api/api-snapshots/ReactCommonDebugCxx.api b/scripts/cxx-api/api-snapshots/ReactCommonDebugCxx.api
index cd608ca12bc3..20dd41f82953 100644
--- a/scripts/cxx-api/api-snapshots/ReactCommonDebugCxx.api
+++ b/scripts/cxx-api/api-snapshots/ReactCommonDebugCxx.api
@@ -321,8 +321,8 @@ class facebook::react::AccessibilityProps {
   public facebook::react::AccessibilityTraits accessibilityTraits;
   public facebook::react::AccessibilityValue accessibilityValue;
   public facebook::react::ImportantForAccessibility importantForAccessibility;
-  public facebook::react::Role role;
   public std::optional<facebook::react::AccessibilityState> accessibilityState;
+  public std::optional<facebook::react::Role> role;
   public std::string accessibilityHint;
   public std::string accessibilityLabel;
   public std::string accessibilityLanguage;
diff --git a/scripts/cxx-api/api-snapshots/ReactCommonFrameworksCxx.api b/scripts/cxx-api/api-snapshots/ReactCommonFrameworksCxx.api
index c06d3fc44d2a..8f02bdc58fd1 100644
--- a/scripts/cxx-api/api-snapshots/ReactCommonFrameworksCxx.api
+++ b/scripts/cxx-api/api-snapshots/ReactCommonFrameworksCxx.api
@@ -570,8 +570,8 @@ class facebook::react::AccessibilityProps {
   public facebook::react::AccessibilityTraits accessibilityTraits;
   public facebook::react::AccessibilityValue accessibilityValue;
   public facebook::react::ImportantForAccessibility importantForAccessibility;
-  public facebook::react::Role role;
   public std::optional<facebook::react::AccessibilityState> accessibilityState;
+  public std::optional<facebook::react::Role> role;
   public std::string accessibilityHint;
   public std::string accessibilityLabel;
   public std::string accessibilityLanguage;
@@ -780,8 +780,9 @@ class facebook::react::BaseScrollViewProps : public facebook::react::HostPlatfor
   public facebook::react::Point contentOffset;
   public facebook::react::ScrollViewIndicatorStyle indicatorStyle;
   public facebook::react::ScrollViewKeyboardDismissMode keyboardDismissMode;
-  public facebook::react::ScrollViewSnapToAlignment snapToAlignment;
+  public static constexpr Float kDefaultDecelerationRate;
   public std::optional<facebook::react::ScrollViewMaintainVisibleContentPosition> maintainVisibleContentPosition;
+  public std::optional<facebook::react::ScrollViewSnapToAlignment> snapToAlignment;
   public std::vector<Float> snapToOffsets;
   public void setProp(const facebook::react::PropsParserContext& context, facebook::react::RawPropsPropNameHash hash, const char* propName, const facebook::react::RawValue& value);
 }
diff --git a/scripts/cxx-api/api-snapshots/ReactCommonNewarchCxx.api b/scripts/cxx-api/api-snapshots/ReactCommonNewarchCxx.api
index 1da6bfffd246..1d69ab6fc014 100644
--- a/scripts/cxx-api/api-snapshots/ReactCommonNewarchCxx.api
+++ b/scripts/cxx-api/api-snapshots/ReactCommonNewarchCxx.api
@@ -321,8 +321,8 @@ class facebook::react::AccessibilityProps {
   public facebook::react::AccessibilityTraits accessibilityTraits;
   public facebook::react::AccessibilityValue accessibilityValue;
   public facebook::react::ImportantForAccessibility importantForAccessibility;
-  public facebook::react::Role role;
   public std::optional<facebook::react::AccessibilityState> accessibilityState;
+  public std::optional<facebook::react::Role> role;
   public std::string accessibilityHint;
   public std::string accessibilityLabel;
   public std::string accessibilityLanguage;
diff --git a/scripts/cxx-api/api-snapshots/ReactCommonReleaseCxx.api b/scripts/cxx-api/api-snapshots/ReactCommonReleaseCxx.api
index 1da6bfffd246..1d69ab6fc014 100644
--- a/scripts/cxx-api/api-snapshots/ReactCommonReleaseCxx.api
+++ b/scripts/cxx-api/api-snapshots/ReactCommonReleaseCxx.api
@@ -321,8 +321,8 @@ class facebook::react::AccessibilityProps {
   public facebook::react::AccessibilityTraits accessibilityTraits;
   public facebook::react::AccessibilityValue accessibilityValue;
   public facebook::react::ImportantForAccessibility importantForAccessibility;
-  public facebook::react::Role role;
   public std::optional<facebook::react::AccessibilityState> accessibilityState;
+  public std::optional<facebook::react::Role> role;
   public std::string accessibilityHint;
   public std::string accessibilityLabel;
   public std::string accessibilityLanguage;