dvaldivia, cdolan92, Sunlitmechanism thank you for comments. The new build is currently being rolled out, so depending on whether you are in selected group or not, you will get current Intel version download link, or link for new universal binary. Same logic is used inside Teams application when requesting updates, so if you don't get native build via updates, you won't be able to download it from Download page either.
As soon as rollout is finished, everyone should get updated automatically, so there isn't need to hunt for download links and manually install Teams. If you wish to speed this up for yourself, you can opt-in for Microsoft Teams Preview Program https://docs.microsoft.com/en-us/microsoftteams/public-preview-doc-updates, which will give you faster updates and earlier access to new features. Including Native M1, where it's guaranteed for everyone already.
greencatdude, leon_guan the driver you are seeing being still Intel is audio driver enabling sharing system audio during screen sharing. We had some challenges with this part, but we sorted them out and now it's in testing phase. New version should be rolling out soon and after that Microsoft Teams will stop requiring Rosetta completely