Uno.WindowsCommunityToolkit/Microsoft.Toolkit.Uwp.DeveloperTools/VisualStudioToolsManifest.xml

<FileList>
  <File Reference="Microsoft.Toolkit.Uwp.DeveloperTools.dll">
    <ToolboxItems VSCategory="Windows Community Toolkit" BlendCategory="Windows Community Toolkit">
      <Item Type="Microsoft.Toolkit.Uwp.DeveloperTools.AlignmentGrid" />
      <Item Type="Microsoft.Toolkit.Uwp.DeveloperTools.FocusTracker" />
    </ToolboxItems>
  </File>
</FileList>