Earlier quoted context omitted.
No idea why you are even bringing this up. It works just fine right now.
It verifiably does not on open source and free android roms like Graphene. Unsure where you're getting your info.
I run GrapheneOS and use several US-based banking apps. I'll not name them since I don't really want my HN account associated with my financials in any way, but I've got a mix of well-known national bank apps and smaller local credit union apps working.
I'll admit there is a single institution's app I've found that doesn't work, but that is just one of several that I use.