It's great to have .NET ecosystem expanding.
I am a .NET dev, and I still use web optimized for mobile as my mobile platform(where applicable). Tried MAUI and all the other stuff, just doesn't cut it for me. You can make an app using it, but I would rather not to. The best 'mobile platform' for me was blazor hybrid, but then again - if it's already blazor why not go full web...I guess it depends on the 'seriousness' of your mobile application. If I had to develop a complex mobile app, I might choose another language framework, cause MAUI uses XAML and MVVM stuff that is quite a big overhead IMO.