Sorry, I didn't sign up for notifications for this. Nothing worked so I moved everything over to Bitwarden, which seems to offer a lot more than 1Password anyway but for $10 a year you can lock it down with a hardware key. For the GrapheneOS archives, this was my reply from 1Password. This did NOT work for me. I recommend switching to Bitwarden anyway. My two cents.
"I'm Jake from the Technical Support team here at 1Password. I'm happy to help.
We don't recommend retrieving the current 1Password 8 APK from third-party APK repositories like APKPure due to file integrity concerns. It might be possible to verify the file integrity with a file hash, but we would still need to acquire the APK from the Play store for comparison.
If you already have the Android SDK installed, can use the adb command, and have an Android device with access to the Play store, you could potentially download the APK and then transfer it with the adb pull and adb install commands.
I'm sorry I don't have an easier solution, but with some effort, I think you will at least be able to try installing 1Password. Let me know how it goes, or if there's anything else I can do to help. Until then, have a nice night!
Best regards,
Jake C
1Password Technical Support
https://support.1password.com"