Second macOS user account can't add credit card to Apple Pay.
I have a Mac mini M4 with two standard user accounts. Mine and my wife's. I have my credit card added to Apple Pay. When my wife tried using Apple Pay (signed into her account), it asked for her iPhone to complete the purchase. Her iPhone was by the keyboard but the Mac mini said the iPhone couldn't be found.
Went to Settings > Wallet & Apple Pay on the Mac mini. Her credit card was not added for Apple Pay. Tried to add it. Got an error message that said Apple Pay was already set up for another user (me). I had no idea Apple Pay wouldn't let two users in macOS have their own cards in Apple Pay.
Mac mini, macOS 26.1