Managing sound and video settings during Teams meetings and calls for optimal communication
I agree - the problem is with New Teams.
I have a Lifecam Cinema and it likewise worked perfectly with Teams Classic, but not with New Teams.
I even swapped back to Teams Classic to get my webcam support back, but then MS went and took that option away.
MS appear to have gotten out of the market for WebCams now, and I suspect they'll just leave it broken for New Teams.