[jmnicolas]

I'm mainly on WPF, so I might say something wrong, but I think adjusting your UWP app for WinUI would be a breeze compared to redeveloping everything with Win32.

[flohofwoe]

Only up to WinUI 2 apparently, WinUI 3 doesn't support UWP anymore:

https://microsoft.github.io/microsoft-ui-xaml/about.html