I switched from an iPhone 11 to a brand new pixel 7 and installed Graphene OS three weeks ago. The experience has been amazing. I don't see myself ever going back, even if iPhone's UX is superior to androids at times IMO. I am recieving MUCH more privacy and security improvements than I am minor inconveniences like non functional apps. Only apps that don't work ATM are cash app and my bank app. Strike works and I use my bank via a PWA. Its Android, just better... a few things might not be as convenient or streamlined, but I'm willing to sacrifice those for improved security and privacy. And with is being open source software, it's only going to improve.
Discussion
Only reason i want banking app work is so i dont need keep key list with me all the time. But let see. I hope it work but i it dont i will mayby figure way around it. Mayby just buy cheap phone to use as and signing device for my bank.
Just if there was money that dosent need banks or their apps. 😂
Install play store on GrapheneOS, install your bank apps, uninstall the play store again. Bada Bing, Bada Bang.
While in the of discovering, confronting the truth is inevitable.
They say facts are the enemy of the truth.
🫰🏻 attention 
Banking apps, and not even all of them, have an issue with rooted phones and app sources other than play store. That's why Aurora Store doesn't always work when installing bank apps, thsy detect how they were installed. However they never check if the play store they've been installed with is still present on the phone