I just went through the Simple -> BBVA -> PNC transition. Yesterday when I installed the PNC app on my Pixel, I got the warning that I would need to allow storage access. But then the storage access prompt never came up. I just checked, the app doesn't have storage access but it works fine. Either they ended up not using the storage (maybe using a legitimate attestation API), or the latest (for one week) version of Android has a different, isolated storage API that doesn't need permission.