Summary
Meeting organizer can assign seats to meeting invitees and all the participants currently in the meeting by dragging the user to the preferred seat. Once assigned, organizer can apply the newly created layout and everyone in the meeting will see the participants organized by the seating assignment.
Body
Context
Teams meeting organizers now have the option to assign seats in Together Mode for all participants. Organizers can assign seats to meeting invitees and current participants by dragging users to their preferred seat. Once assigned, the organizer can apply the newly created layout, and everyone in the meeting will see participants organized according to their seating assignment.

Note: A Teams meeting organizer will see an option to assign seats to participants while turning on Together Mode or later from the scene selection dialog box).
Instructions

- A window will pop up, allowing you to select scenes and make other configurations in Together Mode.

- Select Assign Seats.
- Select a user from the meeting roster and drag them to their seat.
- Select Assign once you've completed assigning seats.