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Teams is an Electron app (like Skype, Signal, VS Code, Atom, etc), which is based on Chromium. Chromium doesn't have Wayland support yet so those run via XWayla

• Arnavion 6y ago
  Electron running on Wayland natively isn't relevant to its ability to screen-share. Even if it were running on Wayland it wouldn't be able to screen-share just based on that alone, because having a Wayland window doesn't have anything to do with screen sharing. Native applications these days have the option to use pipewire and xdg-desktop-portal for screen-sharing, and it doesn't matter whether they use that from a Wayland window or an Xwayland window. Both Firefox (under Wayland) and Chromium (under Xwayland) use this method today. Unfortunately Teams does not use that method and instead calls an X function directly, which crashes, as I wrote in the sibling comment.