Hello cookiechick3,
Ensure you're follow the steps below to add the ticket to Wallet, and reach out to the merchant if the issue persists for further assistance: Add, use, and share boarding passes, tickets, and other passes in Apple Wallet - Apple Support
"How to add a boarding pass, ticket, or other pass to Apple Wallet on your iPhone
- Open the app, email, notification, or other communication that contains your boarding pass, ticket, or other pass.
- Tap Add to Apple Wallet.

- Follow the instructions on the screen.
- If necessary, tap Add in the upper right corner.
If you don't see an option to add your boarding pass, ticket, or other pass to the Wallet app, contact the merchant or company that issued it to make sure they support passes in the Wallet app."
Kind regards.