Sony WH-XB910N not detected by Windows 11

[stattersall]

I'm trying to connect my Sons Sony WH-XB910N to my laptop on windows 11. With bluetooth turned on my laptop and the headphones turned on my laptop cant detect them. I have the same issue on my sons desktop pc too. Please can you assist.

[Marino.Manolo]

Bluetooth turned on is not enough, are the Headphones in Pairing mode?:
https://helpguide.sony.net/mdr/whxb910n/v1/en/contents/TP1000442800.html