I use Calyx on a Fairphone 4. It’s not totally degooglified, since it comes with MicroG which is used to connect to Google services. I use Aurora Store and a couple of original Google Apps like Gboard too (none of my Google apps can access the internet, since they’re behind the built-in firewall). It works well except call functionality which can be wonky and there’s the issue that a lot of apps from Play don’t work well with MicroG. I only use a small selection of Play apps though, so it doesn’t bother me too much.
I never bothered with banking apps. (Outside of the virtual debit card app from my bank. That one did install successfully. However, I never got try out in store because it deleted my virtual card after a few days and I didn’t care enough to set it up again.)