Hello.
You can use Google Pay with Bunq, since they added PayPal and you can link your PayPal account.
I've got a Direct Debit linked to PayPal and Bunq, but I can also add my Bunq Mastercard.
Edit:
You can't select a Debit card, only linked and confirmed bank accounts, but that will do the trick :).
and I'm based in Germany :B... yay