Extend Microsoft.Windows.Compatibility with Winforms controls

[JensNordenbro]

Can we expect Microsoft.Windows.Compatibility to add the controls that was removed from Winforms when ported to .NET Core? (https://docs.microsoft.com/en-us/dotnet/core/compatibility/winforms)
These omissions makes it hard to port old code when a codebase has extensive dependencies on a thirdparty component that relies on any of the mentioned classes (DataGrid/ContextMenu/..) ;especially when it is hard to convince the thirdparty supplier to create a new version of the library.

Otherwise my impression is that .net 5 is very compatible with using .net framework dependencies although pure dependencies are prefered