I find that usually (but not always...) restarting Teams works. I chalk it up to "made by Microsoft". People make fun of me at work when I ask them if they tried rebooting it whenever they have a problem (the company I work for runs Windows on the desktop, I'm the odd one out running Linux).

I used to think that this was an issue with me running Linux, and an "unsupported" distro at that (Arch). But I'm always reassured (in a way) when I see people having the exact same issues I do on Windows, with basic, run-of-the-mill configs (I have multiple sound cards, some of which come and go).