Huh. This article lumps Apple in with Google when its only qualms seem to be with Google's terrible behavior. The entire article is about Google Play.

Because Apple has always been a closed platform whereas Android started out being relatively open. For Android there is an alternative to Play Integrity which would enable governments to get remote attestation assurance on non-Google Android based operating systems like GrapheneOS, but that alternative does not even exist in the Apple ecosystem.

Yeah, what alternative is there for iOS except the framework that Apple supplies?