It may be PWM-related issues that some people get using OLED screens. Are you getting sore eyes and a slight headache? My wife was getting these symptoms, and we had no idea it was caused by her new (at the time) iPhone 12 Mini.
We just thought it was a normal headache. Also, because she’s in her early 40s, maybe she was starting to suffer from age-related far-sightedness. 🤷🏻♂️ She actually is, so she went to the optometrist and got glasses, but the aggravated eyes and headache persisted.
I don’t get these symptoms, but my non-techie wife does, and it took us 6 months to figure out it was her iPhone causing the issue, as neither of us had OLED screens before. 🤷🏻♂️
There is a way to reduce PWM effects (worked for my wife!!), but I don’t know if it works on iPads.
Also, I just bought my wife a new iPad Air M2, and obviously that’s LCD. Her new iPhone 15’s OLED screen doesn’t bother her as much as her previous 12 Mini, which caused her headaches for the entire 3-4 years she owned it.