In this video https://youtu.be/zZmz8oSn8uA at 2:14 there is a demonstration of "Listen Together" feature available on Samsung devices that allow playing music on two separate Bluetooth speakers from different brands. Is there equivalent feature on GrapheneOS or workarounds?
Thanks for your help!
That sounds like Bluetooth LE Audio streaming.
I have not tried it, but I think it should work....