XML tags are not migrating with android studio .. the ones that are, are not linking properly. XML tags after running migration are completely useless.
I have compiled this cheat sheet for my app, thought it would be useful for others as well so here you go.
android.support.design.widget.BottomSheetDialog
com.google.android.material.bottomsheet.BottomSheetDialog
android.support.design.widget.TextInputLayout
com.google.android.material.textfield.TextInputLayout
android.support.design.widget.CoordinatorLayout
androidx.coordinatorlayout.widget.CoordinatorLayout
android.support.design.widget.NavigationView
com.google.android.material.navigation.NavigationView
androidx.core.view.ViewPager
androidx.viewpager.widget.ViewPager
android.support.design.widget.BottomSheetBehavior
com.google.android.material.bottomsheet.BottomSheetBehavior
android.support.v7.widget.Toolbar
androidx.appcompat.widget.Toolbar
android.support.design.internal.BottomNavigationItemView
com.google.android.material.bottomnavigation.BottomNavigationItemView
android.support.design.internal.BottomNavigationMenuView
com.google.android.material.bottomnavigation.BottomNavigationMenuView
androidx.appcompat.widget.CardView
androidx.cardview.widget.CardView
android.support.design.widget.BottomNavigationView
com.google.android.material.bottomnavigation.BottomNavigationView
androidx.core.view.ViewPager
androidx.viewpager.widget.ViewPager
importandroidx.core.widget.DrawerLayout
androidx.drawerlayout.widget.DrawerLayout
androidx.appcompat.widget.RecyclerView
androidx.recyclerview.widget.RecyclerView
androidx.core.view.PagerAdapter
androidx.viewpager.widget.PagerAdapter
importandroidx.core.app.FragmentManager
importandroidx.fragment.app.FragmentManager
android.support.design.widget.AppBarLayout
com.google.android.material.appbar.AppBarLayout
android.support.v7.widget.Toolbar
androidx.appcompat.widget.Toolbar
android.support.v4.widget.SwipeRefreshLayout
androidx.swiperefreshlayout.widget.SwipeRefreshLayout
android.support.v4.widget.DrawerLayout
androidx.drawerlayout.widget.DrawerLayout
android.support.design.widget.CoordinatorLayout
androidx.coordinatorlayout.widget.CoordinatorLayout
android.support.design.widget.TabLayout
com.google.android.material.tabs.TabLayout
android.support.design.widget.FloatingActionButton
com.google.android.material.floatingactionbutton.FloatingActionButton
android.support.v4.widget.NestedScrollView
androidx.core.widget.NestedScrollView
android.support.v4.widget.Space
androidx.legacy.widget.Space