doffactory We think that your device may not be working due to upstream security fixes which would mean that this is also the case on stock OS.
I understand that this is a lot to ask but we do not have this specific Bluetooth device. Would it be possible for you to backup your data and flash stock OS on the latest Android 14 QPR2 release to see whether your device works there? It likely won't, but confirming that would be a big help to the team.