When I pair and connect my earbuds, they’re added to the sound devices list but aren’t getting any sound. Before a minute passes, they disconnect and are removed from the list of sound devices.
I had some success with my bluetooth headphones by connecting them on the terminal with bluetoothctl instead of using the gui.
Rough steps:
start bluetoothctl on the console
enter scan on or scan le depending on if you need to use Bluetooth LE or normal Bluetooth and put your headphone into pairing mode
look for the mac address of your headphones and then do scan off (to get rid of the message spam) and pair <address> (it helps to not have any other BT devices nearby or you get a lot of spam)
followed by trust <address>
However they’re correct that the AX210 is usually better supported on Linux and pretty easy to replace.