Dumdum Resources exist for this already
There are 37 US banks on that list, while there are 4600 FDIC insured banks in the US ("insured institutions"), according to the FDIC website. That's less than 1% of banking apps covered, assuming all of those banks have an app.
I use a local credit union which is not on that list. I don't expect to find any information about it here since it's relatively obscure. That being said, where would be the appropriate place to ask? For me this is still a possible risk I have to deal with when switching to GOS.
Others mentioned play store integrity will fail in VMs by design, but that just means that if an app doesn't work in the VM, it might not work on a real device. But if it does work in a VM, it will definitely work on a real device. So there's still some value to testing it.