After using LineageOS for long time, I have finally moved to GrapheneOS. I use a lot of banking and financial apps which I never felt comfortable using on LineageOS due to lack of proper sandboxing, unlocked bootloader etc.
GrapheneOS works flawlessly just like Android. You don’t even notice there’s hardening underneath. Also it protects from Google’s evil location tracking using WiFi/Bluetooth or even when the Location is turned off. I don’t understand how people in general are comfortable with Google tracking all the time. You can use Google Play and Play Services in a sandbox that works just like regular installation, but without deep tracking.
If you haven’t tried GrapheneOS, try it. You won’t go back to regular Android.
I can’t definitively say, as that depends on your financial institution. There is a community list here with apps that have been confirmed as compatible or incompatible. You could also try searching the Plexus app, which is a larger community app compatibility project. My credit union’s app has worked on every deGoogled ROM I’ve used, including iodéOS, and I’ve never experienced the problems others mention.