Not my phone fortunately but a friend has just swapped from Apple to a new Samsung S24 ultra and she can't add her card to Google wallet or Samsung pay, she's tried three different cards and non work, as a test I added them to my Google wallet and all worked OK on my S24 Ultra.
So what could it be as I'm at a loss, we tried to clear cache etc etc, as a last resort we wiped the phone and started again and still can't add cards!!, could it be a faulty phone?
Any help appreciated