Solved
my thumbnail is not appearing
I am the host and I can see all the participants but not myself.
Hello,
If you’re able to see everyone else in the meeting but your own thumbnail isn’t showing, it may simply be that your 'Self View' is hidden. Your video can still be visible to everyone else.
While you’re in the meeting, hover over the video area and click the … (More) menu on a video tile, then select 'Show Self View'. Your thumbnail should appear again.
For more info, you may check this article: Showing and hiding your video in a meeting.
Hope this helps! If you’re still not seeing yourself after that, let us know and we’ll be happy to look into it further.