- AXML and XAML are two different XML specifications.
- AXML is just supported/available for Xamarin.Android.
- XAML is the way Xamarin Forms could standardize Cross Platform UI based on XML specification.
- XAML is the way Xamarin Forms could standardize Cross Platform UI based on XML specification.
If you are using native Xamarin Android you will do UI using axml, if using Forms then using XAML.