Teams chat seems to work fine on my 2021 MacBook Pro with M1 processor. We typically use zoom for video calls. MS Outlook on the other hand frequently crashes. Maybe there’s a memory leak issue?
I don't know if the native app on the Mac is the same as the Windows one, but the latter is absolute crap. It's sooo laggy. Sure, I don't have a 64 core thread ripper or other ridiculous CPU, but even on my 11th gen i7 work laptop, the webapp runs circles around the native app. Even on Firefox on Linux.
However, they must have caught wind of this, because there have been some "improvements" recently, where they reduced the vertical screen space with an empty menu line, and it also feels a bit less snappy than before.
My wife uses Outlook (but not Teams) on her 2021 M1 MBP and there is some sort of leak. Her SSD fills up with swap files or something, and restarting gives her back 90GB of space. Literally. It is crazy.
I don't know if it's Outlook though. I have similar issues with my Intel MBP, and I don't use Outlook. I slowly drain from 20GB available down to 2, and then I have to restart. It's like living in the early 2000's, restarting all the time.