So I've moved from the P3S to the Mavic and am loving it.  But in using the DJI Go 4 vs the DJI Go app I did notice something missing.  Right next to the AE lock in the old app there is a box that I can switch from auto focus to exposure and then by tapping set that.  I liked it since I was able to set exposure just by tapping it.  In DJI Go 4 though, that box is gone.  The only way I can see to set exposure is to map it to center exposure via a C button.  So is that feature missing in DJI Go 4?

You need to update to the latest version GO 4!   (I use IOS)

What version do you have?  I don't see any updates for DJI Go 4 app and mine is at v4.0.2(2776)