Both of my banking apps (Wells Fargo and Amex) work just fine for me. Amex doesn’t remember my phone and needs 2fa every login, but that’s fine with me.

I might give this a try. I’ve been using the futo experimental for the jp input

Well because of this, I bought a new phone and am now using GrapheneOS. I’m hoping to last at least 5 years with this, and hopefully by the time I want a new phone, grapheneos will have made a deal to have more compatible phones.