Can't say about your setup, but I tried a BT headset with mike on Leap
15.1+Gnome+Jitsi, and the result was crap. Lots of noise. I would have
to try again in order to describe exactly.
So you will have to try to know whether it works or not for you.
That sounds like what my internal microphone was like. So perhaps it's not the microphone but Teams.
I need to see if I can borrow a headset from someone...