Manually add a loyalty card to wallet

If it’s just a membership card you can look in the Apple App Store. There are third party apps that may do what you need and the card can be added to Apple Wallet app. One of the ones discussed frequently in the community is Pass2U.

Any card added to your Wallet must be approved by the company that issued the loyalty card. Many companies do allow you to add their loyalty cards to the Wallet and when they do, you will see a link on their website/app or they will send you a link in an email to add it.

• Use passes in Wallet on iPhone - Apple Support
• Add, use, and share boarding passes, tickets, and other passes in Apple Wallet - Apple Support

For companies that don't allow access to the loyalty card in the Wallet app, your best option is to take a picture of it to add to your Photos and can create a separate album for any Loyalty Cards that are not available for Wallet use.

Yes, not the most user friendly interface, but it works for some community members. I’m glad you were able to get a solution that works for you.