I put GrapheneOS on a Pixel 9a for my wife. She has Widex hearing aids. I installed the Widex Moment app from the Playstore. I cannot get the hearing aids to bluetooth pair, using either the Widex app or via bluetooth connect in settings.
Her hearing aids work fine, she just can't change any settings with the app. She is still able to change the settings using her old iPhone. I have tried the workaround solutions listed in the pinned message (8330-app-compatibility-with-grapheneos). No joy. Since you got this to work, any suggestions for me?