No. This is the fido2 / webauthn standard, where the device itself generates new keys for each website and the device uses these stored keys to perform public k

No. This is the fido2 / webauthn standard, where the device itself generates new keys for each website and the device uses these stored keys to perform public key authentication to log into websites. For some ecosystems (namely iCloud Keychain) it syncs these key pairs between devices. They already have "sign in with google" which directly links sites to your Google account. This is not that.