We're doing it with PHP... we call it SuperNative (https://nativephp.com/blog/supernative)

Yes, native .NET without MAUI is great for that. I have my app running with MvvmCross and two native UIs on iOS and Android since 2018, with hundreds of thousands of installs.

A Rust implementation of this idea is Crux: https://redbadger.github.io/crux/