Something like the mix concept of BottomNavigationView and BottomAppBar.

it is urgly
I don't think we need this.
Hi I don't think this is part of the spec. So we probably won't implement it. https://material.io/design/components/app-bars-bottom.html#behavior
While this isn't part of spec, I figured that I would add this in case anyone else wants it. With the bottom app back you can evenly space your icons doing this:
if(bottomAppBar.childCount > 0) {
val actionMenuView = bottomAppBar.getChildAt(0) as ActionMenuView
actionMenuView.layoutParams.width = android.widget.ActionMenuView.LayoutParams.MATCH_PARENT
}
Most helpful comment
it is urgly