But we should try to build friendly relations in hopes of influencing them to treat their people better

It's like dating an abusive person and hoping to fix them lol.

Could it be possible for Scotland to gain independence while maintaining good trade relations with England?

It’s economic growth has been higher than US and all of its colonies.

Yet inflation is high, interest rates are high, and rubles are cheaper than at any time since Feb 2022

Graphene OS - best privacy and security, only for Google Pixel phones

Calyx OS - less secure but supports cheaper phones (Motorola) and eco-friendly phones (Fairphone)

Honorable mentions are LineageOS, /e/ OS, Replicant and iode OS, however their security is much worse than of Calyx/Graphene (no verified boot), so use at your own risk

Yes, they exist, but there is no reason to use them other than tinkering around. Also they have much worse security than Android or iOS. So if you need something private and open source there are a plenty of degoogled Android ROMs.