You can view the changes made to the default new React Native Windows applications for C++ and C# using React Native Upgrade Helper. See this document for more details.

Important Notice: Starting from this release, users will see a warning when using the CLI commands for the old architecture. Please ensure you are aware of this change to avoid any disruptions.

Reliability

Removed unneeded @azure/core-auth dependency (#14919) Removed unneeded @azure/core-auth dependency (#14919) · microsoft/react-native-windows@c5d7457 (github.com)
Fixed an issue where changes to the adjustsFontSizeToFit property on Text components did not properly recalculate text layout Fix : adjustsFontSizeToFit just redrawing won't recalculate the layout (#14813) · microsoft/react-native-windows@3e6cccc (github.com)

New Architecture-specific changes

Implemented snapToStart, snapToEnd, snapToOffsets, snapToAlignment and snapToInterval property for ScrollView in Fabric [Fabric] Implement snapToStart, snapToEnd, snapToOffsets property for ScrollView (#14800) · microsoft/react-native-windows@2198313 (github.com) [Fabric] Implement snapToAlignment property for ScrollView (#14841) · microsoft/react-native-windows@6bd0793 (github.com) [Fabric] Implement snapToInterval property for ScrollView (#14847) · microsoft/react-native-windows@2cde3f1 (github.com)
[Fabric] Implement keyboardDismissMode in ScrollView [Fabric] Implement keyboardDismissMode in ScrollView (#14723) · microsoft/react-native-windows@2969c7b (github.com)
Added support for (ariaHidden , importantForAccessibility, accessibilityElementsHidden) to have unified underlying behaviour acrross all components. [ Fabric ] Added ariaHidden accessibility prop across all components (#14836) · microsoft/react-native-windows@5cc75ae (github.com)
Implement the onPressOut property for the fabric implementation of TextInput [Fabric] Implement the onPressOut property for the fabric implementation of TextInput (#14784) · microsoft/react-native-windows@7b7c004 (github.com)
Added support for the scrollEnabled, OnScroll event for the TextInput component. [Fabric] Implementation of scrollEvent Handling and scrollEnabled, OnScroll prop for TextInput (#14946) · microsoft/react-native-windows@d648eba (github.com)
[Fabric] Implementation of accessibilityDescription (#14818) [Fabric] Implementation of accessibilityDescription (#14818) · microsoft/react-native-windows@3dea19c (github.com)
[Fabric] Implement maxFontSizeMultiplier in Text Input [Fabric] Implement maxFontSizeMultiplier in Text Input (#14639) · microsoft/react-native-windows@068dba7 (github.com)
Implement autoFocus property for TextInput for fabric [Fabric] Implement autoFocus property for TextInput for fabric (#14816) · microsoft/react-native-windows@d0f17f8 (github.com)
[Fabric] Implement onContentSizeChange in TextInput (#14785) [Fabric] Implement onContentSizeChange in TextInput (#14785) · microsoft/react-native-windows@dee65eb (github.com)
Added support for selectionColor in TextInput component Fabric : Added support for selectionColor in TextInput component (#14743) · microsoft/react-native-windows@4757284 (github.com)
Implement aria-level, aria-posinset, aria-setsize in TextInput [Fabric] Implement aria-level, aria-posinset, aria-setsize in Switch (#14735) · microsoft/react-native-windows@6916370 (github.com)
[Fabric] Implement aria-level, aria-posinset, aria-setsize in TextInput (#14732) [Fabric] Implement aria-level, aria-posinset, aria-setsize in TextInput (#14732) · microsoft/react-native-windows@2805c1e (github.com)
Added EllipsizeMode for tail and clip, for head and middle the behaviour maps to default tail alignment of ellipsis. Text : Added EllipsizeMode for tail and clip alignment (#14660) · microsoft/react-native-windows@d6501a3 (github.com)
Add aria-level, aria-posinset and aria-setsize in Image (#14721) Add aria-level, aria-posinset and aria-setsize in Image (#14721) · microsoft/react-native-windows@9c55fc4 (github.com)
Add accessibilityValue support to Button component (#14903) (#14904) Add accessibilityValue support to Button component (#14903) (#14904) · microsoft/react-native-windows@a0851e9 (github.com)

Other

Enable Console Logging for playground Apps (#14944) Enable Console Logging for playground Apps (#14944) · microsoft/react-native-windows@16a63e7 (github.com)
[win32] Remove usage of Animated in LogBox (#14809) [win32] Remove usage of Animated in LogBox (#14809) · microsoft/react-native-windows@43cb59d (github.com)
Removing a use of .. in a relative include path to allow the file to be usable in such projects. (#14802) Remove .. usage in relative include (#14802) · microsoft/react-native-windows@8237585 (github.com)
Remove rnw/cli dependency on rnc/cli (#14727) Remove rnw/cli dependency on rnc/cli (#14727) · microsoft/react-native-windows@b9f8da6 (github.com)