Sharing C#/WinRT projections between unpackaged WinUI 3 apps?

[OptiStrat]

I am considering using .NET + WinUI to develop a relatively large set of small apps that would have to be xcopy-deployed.
Even when published the apps as fully framework dependent (on both for .NET and the Windows App SDK), the C#/WinRT projections still add ~28 MB to every app, which makes them ~100-200x larger than their WPF counterparts.

Does anybody know of a way to achieve the sharing of projections between apps?

Thanks!