I can concur that this issue is not related to licensing. I have two machines, a Mac and a Windows machine, which are joined to the same corporate domain and have the same policies.
The Windows machine (HP Elitebook) is running Teams version 1.6.00.12455 which was released by Microsoft on June 7th. The Mac machine (M2 Air) is running Teams 1.6.00.12966 which was released on June 7th.
Both are connected to a Logitech c930e external webcam. The Windows machine is able to provide the brightness and soft focus settings, but the Mac machine does not have this setting.
It makes my Teams video terribly dark. Using Google Meet is worlds better and is much better technology to conduct video meetings with.