Desktop IMHO only work with WinUI on Windows or iOS apps on macOS (that is a thing right?) However, complex is a thing. MAUI is a cross-platform native control

Desktop IMHO only work with WinUI on Windows or iOS apps on macOS (that is a thing right?) However, complex is a thing. MAUI is a cross-platform native control framework (aka. it creates abstractions over platform native controls). Abstractions like standards are always the minimal common denominator. No specialized controls, not all properties exposed, etc. That is not really a issue of MAUI particular, but something to consider when selecting a UI toolkit (vs. self-rendering cross-platform frameworks like ionic or flutter). If you want to use the full capacity of a UI toolkit, you need to code against that code (and stop being cross-platform). You can do this with .NET (use Android, iOS, Windows ui toolkits directly).