Microsoft has announced that Microsoft Teams has been optimized for Apple Silicon and the new update is now trickling out to customers after undergoing beta testing.
Microsoft Teams has gone native, more than two years after it discreetly launched its private test and three months after the first Apple Silicon apps. The office tool, which is comparable to Zoom and Slack, is now accessible in a version that makes use of the M1 and M2 processor.
Teams formerly needed Apple's Rosetta 2 emulator in order to function on Apple Silicon Macs. Apps must be created to run directly on Apple silicon or they will not function at all once Apple stops including that emulator.
It's only available in Public Preview / Developer Preview it seems: https://github.com/ItzLevvie/MicrosoftTeams-msinternal/blob/master/defconfig#L26