@garrett We provide documentation at https://grapheneos.org/articles/attestation-compatibility-guide on how apps can use the Android hardware attestation to permit GrapheneOS and other hardware / operating systems which aren't certified by Google. This API supports permitting alternate roots of trust and non-stock operating systems. We use new signing keys for each new device model so new devices won't be listed without them updating it and their list won't include alternate builds of GrapheneOS. Apps should not be doing this at all.