I have a set of bluetooth speakers I share between my laptop and desktop linux box. It's a simple Bus 001 Device 003: ID 0a5c:21e8 Broadcom Corp. BCM20702A0 Bluetooth 4.0 Since 6.11.3+ it no longer pairs. Rather it times out, and I see no sound device in either helvum or bluetoothctl. I am a little unsure what you need, but I did build a mainline 6.11.5 kernel this AM and it behaves the same way. Let me know what info/logs would help.
