Even the McDonald's app doesn't work if you install it through Aurora store lol. Even though it's the same signed version distributed through Google play and I have Google play on the device, just not signed into a Google account.

Somehow it detects that it was not installed through Google play and refuses to work with an explicit message stating this reason. I really wonder why they care. The app doesn't even take payment, at least not in this country. You still have to pay at the order portal thing.

Fair enough, but on the flipside I wanted to point out that for at least some of us it's possible to use GrapheneOS with no compromises to the experience. Usually you only hear about those telling you categorically that you "can't" use banking, government and other sensitive apps when that's not true. Anyone on the fence should try it out themselves.