You can use Netflix on GrapheneOS. They incorrectly configured their Play Store listing for the app as needing a Google certified OS but in reality the app doesn't currently check the Play Integrity API. You can install it another way such as Aurora Store and will will work. We do recommend using the sandboxed Play Store as the main way to install apps because it's the most secure (verifies Play Store signing metadata and doesn't trust every WebPKI CA) but unfortunately in this case Netflix did something silly. Do not know why they did it and do not know why they haven't simply stopped marking that way. They use Widevine, not Play Integrity API. Perhaps they intend to use it and did this prematurely, but it would be silly to block non-Google-certified operating systems using it. It doesn't achieve anything.
