MS-Teams No devices available

I assume this is permission based but I can’t seem to find a solution that works to allow Teams access to my Mic and camera. Has anyone got a solution that sticks. I originally got it working by adding the video and sound groups to my users permissions but even that does not seem to work now. Clearly a problem MS don’t want to fix but I am forced to use Teams on my phone and that is painful.

Thx