"on Linux where you only have access to our Skia renderer" ... means what? Can I make a basic GUI app on Linux with Uno. If yes how ?
It used to have a dependency on GTK but no more since the 5.2 release.
There's just no notion of "native controls" that you can embed in an Uno Linux app like you could have if you wanted to embed a 3rd party native UIKit control on iOS.