Samma problem här (25 Maj, 2021). Kort: Handelsbanken Mastercard
It turns out that Handelsbanken is not among the banks that have supported payment methods with Google: https://support.google.com/pay/answer/9093549
Note the ”Your bank decides if its cards work with Google Pay. Banks may restrict any of its cards from making mobile payments”.
Wth? Does this mean that I should switch bank if i want to do business with Google??