TL;DR
- Efforts like Graphene OS face increasing pressure from apps that refuse to run on non-standard Android.
- The custom ROM project characterizes Google’s approach to device attestation as incomplete and flawed.
- Graphene OS is prepared to take legal action if Google won’t let it pass Play Integrity checks.
The app will almost certainly mostly be just wrapping a web interface. But this dedicated browser can provide the site with all the access of an app. The idea will be only this browser can be trusted to access this site and can check the run environment before connects. I’m they’d do the same on the desktop, if they thought it would be swallowed.