Add loyalty card to Apple wallet - without email link

Hi,

I have several loyalty cards that I would like to add to my wallet. I currently use a third party app, however, it would be much simpler to use Apple Wallet to store these.

I have done some research, and every time I see a similar question, people are pointed to Keep cards and passes in Wallet on iPhone – Apple Support (UK)

This relies on the card issuer having sent an email with an 'Add to Apple wallet' link.

Some of my loyalty cards don't have the ability to send such a link. They are from very small businesses who don't have a massive IT budget.

I was hoping for some way to scan the barcode and then add it to my wallet.

Thanks