GrapheneOS Perhaps they intend to use the device fully offline. I myself used an EOL Android 11 device this way until Auditor 81 dropped support for A11. I still use it sometimes but no longer fully trust the results.
I will post the hash for the App Store as well, just in case. Using it is a great idea if the device has network access.
app.grapheneos.apps
Issuer: CN=GrapheneOS
Algorithm: SHA512withRSA
SHA-256: 3384c31fce4a7c008a8f7b2652bc48cc4321f1d2c877b18e30a4ed619af12f6b
GrapheneOS You can use App Verifier to get the fingerprint from the GrapheneOS device.
I don't think it's currently possible to get App Verifier to show system apps. I had to use App Manager.
@dhhdjbd if you are interested, I posted its hash on this forum.