Wallet deleted all my debit/ credit cards!

I have an iPhone 12 mini and all of my devit/ credit cards in my Apple Wallet are gone and now I am unable to link any of my cards. Apple says to contact my card issuers and my card issuers tell me to contact Apple. Not one card will connect. All different card issuers. Happened after I updated my IOS. Can anyone help me please? I cannot access my money now and I don’t know what to do.