GrapheneOS is Android's last hope. They're making great progress with deals with smartphone manufacturers. However, the threat of remote attestation looms eternal. I have essential apps that I cannot afford to lose and if they refuse to work on a non-Google phone the usefulness of GrapheneOS is severely degraded.

No, the solution is having a linux micro-computer. You buy an iPhone shitphone to do banking and whatnot, and never touch it, then just do everything you need off a retroconsole since it runs literally 120% of the other apps a phone would.

Sailfish OS - they even run a device preorder right now.