I don't have a VPN, and no, I have not tried contacting the banks about this issue. I have two Visa and one American Express cards issued through USAA (my bank), as well as a Capital One card through REI. But oddly, when I upgraded from an iPhone 14 Pro to a 17 Pro last September or October and reloaded the cards, the American Express card would not load (it used to be in my Wallet and displayed the transactions). I contacted both Apple and USAA about that problem, and each pointed the finger at the other, so now AmEx is not in my wallet. I have not bothered to pursue that issue any more.
Curious that I'm the only one reporting the issue, because before posting my inquiry I searched the Apple Support community postings and saw several from 2023 and before where people complained about not being able to see their wallet transactions, but all of those threads were closed.
I appreciate the attention to my request.