With respect to 2FA, if you want to be more ready for any future next time, you could migrate to an open-source TOTP app. E.g. andOTP. I use this one, it's fine. The underlying standards don't change in decades, so you can choose any compatible client and be without trouble for years and years. And it may be good to do in any case, googlified phone or not. Good apps also tend to provide password-protected backups.
I have no knowledge about RCS though, never used it so can't tell. Otherwise GrapheneOS user for ~2 years, before that LineageOS, before that CopperheadOS for another few years.
Good to know! I was really eyeing Triodos back in the day, due to what looked like a good ethical stance, but it didn't work out at the time. Nice that they've fixed it! (I've updated my message above as well to include the bank.)