This seems to be mainly brought up by people concerned they'd lose banking apps than people who actually have issues. It's rooted phones that often get blocked, whereas those that run LineageOS/microG without rooting are largely fine.

Yes, there are certainly banks that block more aggressively, but if you look at e.g. iodéOS's forums most of them work fine: https://community.iode.tech/t/banking-finance-and-insurance-...

Anecdotally, I've also seen a lot of stories of people reaching out to support about overblocking actually seeing success. Apparently there are often enterprise reasons for the block and it literally just needs a customer to complain for engineering to be able to act.

My primary banks apps, and websites, work fine on Graphene, with the exception of anything NFC payment related. I do miss that convenience, but I still have a debit card and cash as needed.