You should use the discontinued "DJI Assistant 2", for windows it has version 1.25.
You find it here --> Mavic Air - Download Center - DJI United States & there the "Parameter Adjustment Software" tab in the top
That's the gimbal pan scale that is coming up if you hold your finger on the screen for a while (also the gimbal tilt scale comes up at the same time to the right of the screen), drag then left or right to pan the gimbal or up & down to tilt.