why is the verification number different than my apple id
I am trying to add a card to my apple wallet and I need to verify with my phone number but the auto-filled number is not mine and I can't change it.
iPhone SE, iOS 15
You need to change/add the number on your Apple ID. Look in the Security section when signed in online. You may have to add the new number before you can remove the old number. After the change, allow up to 24 hours for the change to sync. Before trying to make the change, sign out of Messages/FaceTime on all devices/computers.