My "Edit Passes" button has disappeared, what do I do?

I need to elaborate. First, my screen never said Edit Passes, it said Scan Code. I was able to enter one gift card and it appeared in my Wallet- that’s when the scan key disappeared. I have since removed the card and the key is back. Adding the gift card seems to be problematic.

Yes.

1. Scan code

2. Press “add” in Apple Store app.

3. Card appears in Wallet, but there is no “edit passes” key. I can enter noting else.

See screen shot. You will have to take my word that there is nothing below the gift card.

Thank you for your reply, but these cards are for the Apple Store. They are not valid for iTunes or the App Store.

It is not at the bottom of the screen. It was, it is no longer.

Sorry about the double post.

Screen with added card.

Here is the very bottom of the screen.

It gives me some options for that card or pass, one of which is to remove it. None of the options are to Edit Passes. If I remove it I then get the setup screen I posted above.