Add an Apple Store gift card to Wallet

I've seen this question asked on the forums before, but no satisfactory answer.

How do I take an Apple Store Gift Card that does not have a QR code or bar code and add it to Wallet.

I'm NOT asking about iTunes gift cards, App Store gift cards, Apple Music.

It's an e-mailed gift card that does not have a QR code.

There is no way to scan it into the Wallet app or manually enter the numbers.

It was emailed to an email not associated with my Apple ID.

I've seen this: https://support.apple.com/en-us/HT201209

It does not help.

I've seen this: https://support.apple.com/en-us/HT204003

It does not help.