Hello, when using the zoom camera and shooting in manual mode, I am unable to adjust the aperture. But as soon as I switch to auto mode, I can see that the aperture is changing. Any advice with this? Thank you

Yep, same thing with mine. I would imagine yours is locked on 5.6 which is the cleanest for any camera with a 2.8. I wish DJI would stop locking down the settings so we can get maximum control of a very expensive camera.