Additional meeting and call-related features and issues within Microsoft Teams for business
Background filters only works on desktops for some reason only known to Microsoft it doesn`t work on laptops and tablets.
What I have noticed if I log on to a meeting from an email link I get the option window to open for background filter but no backgrounds, but if I run the app on my desktop first then join the meeting I can change the background. The fun part is that you are logged on as running the meeting even though someone else is and if someone is sharing a powerpoint presentation you can control it lol