I’ve just spent 3 hours sorting out my “schoolboy error”. Earlier this afternoon I updated the DJI Fly app (Android) having read and viewed a few positive comments, and updating my Air2S to the latest firmware.
Went out to do a test flight and discovered that the Air2S would not roll left or right. So I did a similar test on my Mini2 - no issues! It’s got to be a faulty Air2S firmware update issue I convinced myself . I uninstalled the Fly App and installed a slightly earlier version - still no roll. Reinstalled the latest Fly version - still no roll.
Lightbulb comes on in the old head - check the Fly app settings! Bingo - the updated firmware had disabled sideways flying! Switched it back on (and reset a few other things) and hooray!
Noobie/Schoolboy/Beginner mistake 0 I felt a total tool!