Hi Mostafa,
My thanks for this but I still have the same sort of issue. Windows 11 (Professional Edition) sees both my BT headphones and external BT speaker as "hands free audio headsets" - call centre type telephone headsets. I have removed the BT headphones and seperate speaker, repaired them, same result. I've tried uninstalling Bluetooth, rebooted and re-paired, same result. The LE Wire headphones does have a microphone in it but under Windows 10, it was seem as headPHONES, not a headSET. The Wonderboom 2 does NOT have a microphone but it is also seen as a headset. I have tried using onboard BT (now disabled) and two different manufacturers of BT dongles, same result every time.
If they connect and correctly pair, sometimes I cannot select them as an Output Device in the Sound output as they are not listed. The Wonderboom conencts and becomes available and is seen as Headphones (Hands Free audio) by the Sound output. However, it does not play properly, chopping the music into sound bites. So far, my only fix appears to be reinstalling Windows 10 on my PC.