I have been having issues my Sonys' WH-1000MX5 connects to my laptop (kubuntu 24.04). I disable my IPhone 15 pro bluetooth so it won't connect automatically.
When I have my Sony headset connect to my laptop directly. it uses the default profile and not the A2DP. A2DP is not avaiable at all.
I found this article:
Change Bluetooth Headphones default audio mode (A2DP Sink vs HSP/HFP)
And it did not work for me. I am hoping if anyone else were able to get A2DP profile connected using Sonys' headset.