This one is definitely the hardest and is the least mature. Have you managed to get off Google on your phone?
I’m using GrapheneOS (Degoogle’d android) on a Pixel 6a. The irony isn’t lost on me that I had to buy google to get off google.
I had tried Pinephone and Plasma mobile, but it still needs more work and I needed a phone sooner as my old one was failing.
How about you? Did you manage to get away from Google?
This site has a crowd sourced list of apps that includes their compatibility on deGoogled Android devices.
Personally, I’ve had very few issues with apps not working, and banking/productivity apps haven’t given me issues on CalyxOS, but your mileage may vary