I just got bit by device attestation. Tried to install the latest ebay app version via the Aurora Store (on GrapheneOS), and instead of presenting me with the option of using my ebay login, it wanted a google account at a play store login with no way to bypass. I was able to downgrade to the previous version which does not require the Integrity API, but the walls are closing in. Only took 7 months: https://news.ycombinator.com/item?id=41517159 (I did get ebay on the phone and filed an issue, hopefully others do the same)