NatWest and Monzo work fine on my Pixel 9a running GrapheneOS. Community maintained list of supported banking apps here:

Google Wallet is not supported at all.

aembleton 6 hours ago | parent | next [-]

Curve works and you can set that up as a replacement for Google Pay.

m00dy 8 hours ago | parent | prev [-]

with avbroot ?

	▲	domh 6 hours ago \| parent [-]
		I didn't have to do any resigning or repacking apks. It just worked installed from the play store.