Headphones work for me and should as well on Mobian. Calls via Bluetooth do not work yet, not sure how to route the audio to the headsets. But I know there’s some stuff going on and people are working on improving the audio configs, should all be much better very soon.
Just type in a few commands and you’ll have an image you can flash.
I’ve got a detailed description of what to do: https://git.erebion.eu/forgejo/erebion/sargo-temp