I wonder how this plays in with chargebacks & consumer protection from cards. If Google's partner bank is a proxy between the merchant and, say, your Amex, wha

I wonder how this plays in with chargebacks & consumer protection from cards. If Google's partner bank is a proxy between the merchant and, say, your Amex, what happens if you need to invoke a chargeback? Does Google's partner get involved and push back against Amex?