Migration Android Support Library to AndroidX

I migrated android support library to AndroidX and using xamarin.androidx.migration, I found using Android.Support. and in the app implementation
using Android.Suppot. From using AndroidX. I thought it would change to. Is that the next step? or is it not necessary?

I removed all reference Android.Support.library but when build then can not restore nuget
"Version conflict detected for Xamarin.Android.Support.Collections. Install/reference Xamarin.Android.Support.Collections 28.0.0.3 directly to project ns_stock.Droid to resolve this issue. ns_stock.Droid -> Xamarin.Android.Support.Design 28.0.0.3 -> Xamarin.Android.Support.Compat 28.0.0.3 -> Xamarin.Android.Support.Collections 😊 28.0.0.3) ns_stock.Droid -> Xamarin.Auth 1.7.0 -> Xamarin.Android.Support.CustomTabs 28.0.0.1 -> Xamarin.Android.Support.Collections 😊 28.0.0.1). Restore failed." something wrong?

Thanks