iOS changed handling of keyboard shortcuts in iOS17 which has limited the use of page turners that emulate keyboards severly. For example the cursor up / down keys are now hardwired to move the selection within a list. You can then no longer assign cursor up / down to anything else in Stage Traxx.
So the only solution for you is to try to select another mode on your Airturn. If possible, switch to Airturn Direct. Or use a midi page turner.