Managing sound and video settings during Teams meetings and calls for optimal communication
From Microsoft support
I have the following information regarding this issue; this appears to be an emerging service incident as multiple users in different environments have been affected. This should be being resolved by our engineers as soon as possible, but I have seen reports of a successful workaround for this issue by rolling back to the previous update. Unfortunately, we don't have any official sources for previous versions of the app, but you should be able to obtain this quite easily by searching in a third-party APK library.