I have the same issue. I have a Samsung Galaxy A23 running Android 13. By default H9 control wasn’t discoverable on the Google play store, so i used the direct link to install.
But, it dosnt work. The H9 will bluetooth pair with the phone. But the app dosnt discover it – I get the message ‘Device not found!’. When i select ‘Search for Bletooth Devices’ the app just crashes. Seems to work in demo mode, but thats it.