For example: The UK has a digital ID requirement which is required for you to be employed in the UK. Additionally the EU digital identity services have a hardware/software attestitation that is required to run their apps. (Many of those which 3rd party software can't run).
Another example of this is the Australian eTA - (Everyone has to have a visa to visit Australia.. but the real only way to get a visa* is you have to get an electronic travel authorization which only works via an App)
https://grapheneos.org/articles/attestation-compatibility-gu...
Apps that ban graphene-os being used:
myGov (Australian government app)
gov.br (Brazilian government app)
Ticketcorner
Authy
Chyrpe Dating
TextNow
mada Pay (Saudi NFC payment app)
McDonald's (International app used for many but not all countries not including the US)
Dott
My SEAT (Connectivity for SEAT cars)
SwissID
Volkswagen
BKK Faber-Castell & Partner
TK-Doc
TK-Ident
TK-App (Blocks access to TK-Safe, TK-GesundheitsMessenger, fingerprint login)
IO (Italian government app which uses it to gate access to the digital wallet feature)
PosteID (Italian postal service’s app used to access the national digital identity system "SPID")
Singpass