Using API 28 Simulator and Samsung S10 API 31.
Init like this:
ProgressDialog progressDialog;
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
progressDialog = new ProgressDialog(requireContext(), ProgressDialog.THEME_FOLLOW_SYSTEM);
} else {
progressDialog = new ProgressDialog(requireContext(), ProgressDialog.THEME_LIGHT);
}
progressDialog.show()