Apple Pay gives out my mobile phone number

Only the personal information necessary to complete the transaction is shared. If the transaction is completed on a website or mobile app and requires shipping, sharing the phone number is usually required.

Change the phone number your banks have on record. The bank should update the number on your card, but you may want to log out of you Apple ID, which will remove all your payment methods from your Wallet app, then log back in and re-add your cards. This will force an update.