android bottomsheetdialogfragment not opening fully on landscape

1class MyBottomSheetFragment : BottomSheetDialogFragment() {
2    //....
3    override fun onStart() {
4        super.onStart()
5        //this forces the sheet to appear at max height even on landscape
6        val behavior = BottomSheetBehavior.from(requireView().parent as View)
7        behavior.state = BottomSheetBehavior.STATE_EXPANDED
8    }
9}