I use edge for MS Teams and screen shares stopped working. It turns out that there is an issue in www-client/microsoft-edge-131.0.2903.51 that breaks screen shares in general. See https://answers.microsoft.com/en-us/msteams/forum/all/mycrosoft-teams-stop-sharing-screen-in-new-version/53307f01-50fa-4827-97b3-9a188b3e2f5f for more information. While other distros downgrade edge, for the time being, portage removed older versions. I suggest to keep at least one older version around, to allow downgrades.