Thanks. That was indeed the one I needed.
Now I was able to switch to pipewire (through these steps). The next issue being that I seem to have no A2DP codecs available for my headset. Tried to remove /var/lib/bluetooth and re-pair my headphones but no luck. Think I’ll might have to install something else or something.
(Marking @moson as the solution but in fact every post here was a solution so thanks a lot!)