You should be able to use Avalonia UI[1] as an alternative GUI layer on Windows, Linux, macOS, iOS and Android.

There is a beautiful functional MVU wrapper around it called Avalonia.FuncUI[2] with Avalonia.FuncUI.Elmish[3] which is an implementation of Elmish[4] (based of the Elm language[4]) for F#.

[1]: https://avaloniaui.net/

[2]: https://github.com/fsprojects/Avalonia.FuncUI/

[3]: https://www.nuget.org/packages/Avalonia.FuncUI.Elmish and https://github.com/fsprojects/Avalonia.FuncUI/tree/master/sr...

[4]: https://elm-lang.org/