<com.google.android.material.bottomnavigation.BottomNavigationView
    android:id="@+id/bottomAppBar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/primary"
    app:itemIconSize="20dp"
    app:itemTextAppearanceActive="@style/BottomNavigationView.Active"
    app:itemTextAppearanceInactive="@style/BottomNavigationView.Inactive"
    android:layout_alignParentBottom="true"
    app:menu="@menu/bottom_menu"/>

enter image description here

i am expecting default height of the bottom navigation view.