Reference Guide

There is no "Nearby" meeting room name shown for
Proximity Join into a scheduled meeting.
While user tried to join a scheduled meeting, they will observe the nearby meeting room name is not shown for join on Join now
page.
As you cannot use Proximity Join, do the following:
1. Click Add a room.
2. Choose a Teams meeting room to join the meeting.
NOTE: For more information on how to Microsoft Teams Rooms issue with the proximity sensor, see Microsoft Teams
Rooms Knowledgebase article
Troubleshooting 17