Cards in Apple Wallet that are linked to my bank accounts are missing - all of them - but not membership or rewards ones

I went to use my Apple Wallet yesterday to pay for something and all of my cards linked to my bank accounts that have been there for some time are just gone. My Rewards and Membership cards are still there. Feels a liiittttle bit suspect and dodgy. I can’t seem to find out why or how this might have happened. I am logged into my Apple ID and have the latest update iOS 18.3.2 (22D82) installed. Has anyone else had this issue and rather alarming concern?