Work out of the box in Debian 13. Not so much in Devuan 6. They are connected in bluetooth. But no sound. I can not see where to change the output source. They must not be connected properly. Sometimes when I try to connect I get:  Conection unsucessfull - No sound end points registered.( thats my translation)

Address              34:D6:93:4F:2A:F0
Address type      public
Name                 HUAWEI FreeBuds SE 4 ANC
Alias                   HUAWEI FreeBuds SE 4 ANC
Class                  0x240418
Appearance       0x0000
Icon                    audio-headphones
Paired                 ja
Trusted               ja
Blocked              nej
Legacy Pairing   nej
Connected         nej
00001000-0000-1000-8000-00805f9b34fb ServiceDiscoveryServerServiceClassID
00001101-0000-1000-8000-00805f9b34fb Seriel port
0000110b-0000-1000-8000-00805f9b34fb Datamodtager for lyd
0000110c-0000-1000-8000-00805f9b34fb Fjernbetjeningsmål
0000110e-0000-1000-8000-00805f9b34fb Fjernbetjening
0000110f-0000-1000-8000-00805f9b34fb Videomøder
0000111e-0000-1000-8000-00805f9b34fb Håndfri
0000112e-0000-1000-8000-00805f9b34fb Telefonbogsadgang (PBAP) - PCE
00001133-0000-1000-8000-00805f9b34fb Server til underretning om beskeder
00001200-0000-1000-8000-00805f9b34fb PnP-information
00001203-0000-1000-8000-00805f9b34fb Generisk lyd
00007033-0000-1000-8000-00805f9b34fb Ukendt
Adapter             /org/bluez/hci0

In the sound app they are sof-hda-dsp, but thats also what the speakers are called.
Am interrested in all suggestions -thanks