> One bank refused to work (even with Google services) so I moved bank

Banks are implementing terrible "security" checks. Users of alternative OSes should be a lot more vocal: change bank, but also complain a lot to the offending one, and make sure to leave them a bad review on the Play Store.

Actually people not using an alternative OS but caring about that should also leave bad reviews to those banks on the Play Store.

At the end of the day, the problem comes from humans in those banks who don't understand and don't give a shit. The only way to make them care about it is to complain enough that it becomes their problem.