Teams call over Teamviewer - Mic not working

iboxtv

Hi, I have computer A (windows 10, Teamviewer 15.14.3) with Teams on it and computer B (Mac OS Big Sur 11.6, Teamviewer 15.21.4).

I am taking control of A with B. I can perfectly hear the sounds from A but my mic doesn't work so I can't speak in the meeting (same for the webcom btw): how could I troubleshoot this? I already tried all the basic check, my mic is on etc... thanks for your help!