Well, after having to scroll a bit down to find a link to the site with the actual list..........................

https://privsec.dev/posts/android/banking-applications-compatibility-with-grapheneos/#united-states

That is for US but there's a list of countries on the right, so choose what you want.

Is there a list? They've linked to the overall compatibility list but there doesn't seem to be anything saying which ones explicitly support GrapheneOS as opposed to just working

I have too many bank accounts. I was shocked that out of all my money related accounts, the app that didn't work was PayPal.