If the GitHub release assets are unavailable, you can extract the .appx from the developer package: Microsoft.UI.Xaml 2.8.7 - NuGet

Microsoft does not directly provide a download button for framework AppXs. Use the (a legitimate reverse-engineered lookup tool used by enterprises):

By following this guide, you’ll ensure your Windows environment has the critical WinUI 3 runtime needed to run the latest generation of Windows applications.

The official way to obtain the specific APPX file is by downloading the NuGet package and changing its extension. Visit the official Microsoft.UI.Xaml NuGet Page .

: If your terminal is working, the easiest way to install it is via winstall.app using the following command: winget install -e --id Microsoft.UI.Xaml.2.8 [4]. The "Hidden" Nuget Method

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