If the far-end device has activated camera tracking where the camera follows the active speaker, you can't control the camera remotely.
You don’t have remote access to any camera presets.
In a call, select the Participants icon in the upper right corner, to invoke the list of participants.
Select the one whose camera you want to control and select Control view.
Adjust the remote camera's tilt, pan, and zoom with the camera control buttons. Tap anywhere outside the buttons when you’re done.