Hi @testa
We apologize for the inconvenience.
Currently, the PWA experience is available for Edge, Chrome, and Firefox browsers running on Linux. You can run New Teams on the Firefox browser.
In addition, we recommend that you use New Teams on your browser instead of Teams Classic, which has more stable performance.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.