I just set up my APP2's in Accessibility->Headphones Accommodations, tuning the AirPods using an audiogram created by my audiologist. I simply scanned a picture of the audiogram into the Health app, worked seamlessly, with the data in the app matching the audiogram. I was really surprised by the improvement in audio quality when listening to music with Accommodations enabled now. Also, with Transparency on, conversations and external audio from TV, etc. were amplified/improved. They won't replace my pricey "real" hearing aids, but the improvements in overall audio quality and experience with my APP2's were quite good.