My banks (in Europe) work fine. The primary thing that is missing is tap-to-pay because Google is abusing its monopoly position and not letting GrapheneOS pass remote attestation. There are some apps that have their own tap-to-pay, such as Curve in most of Europe and PayPal in Germany, but they don't work great everywhere (e.g. where I live, all payment terminals accept tap-to-pay based on debit cards, but more than 50% does not accept credit card-based tap-to-pay, so something like Curve or Garmin Pay doesn't work in many stores).

At any rate, there is a well-maintained list here: https://privsec.dev/posts/android/banking-applications-compa...