I'm using MS Teams on Ubuntu 20.04.1 LTS x86_64, kernel version 5.4.0-58-generic.
I have installed MS Teams from apt package manager. Whenever I start a meeting and open the share tray, I'm not given any options for sharing my screen or any specific windows:
Another Ubuntu user I know has no problems with screen sharing. Whenever I boot into Windows 10, I get the proper functionality, so it's definitely not a meeting participant permissions issue.
I have tried uninstalling and reinstalling teams, along with removing its configuration files several times, the problem still persists. Previously I used an installation from a .deb file, downloaded from Microsoft's website. I had the same problem. I don't think I have any packages that could conflict with Teams, however suggestions for what to look for are appreciated.
EDIT: The problem was using Wayland instead of Xorg. Switching to Xorg solves the problem immediately.

