Zoom is available on Mobile and Tablet.
Zoom tips

Pin screen allows you to disable active speaker view and only view a specific speaker. Pinning another user's video will only affect your local view in the Zoom Room, not the view of other participants and will not affect cloud recordings.

Spotlight video puts a user as the primary active speaker for all participants in the meeting and cloud recordings. To spotlight, you need at least 3 participants in the meeting with their video on and can only be done by the host.