https://apps.apple.com/de/app/pass4wallet-store-cards/id1423...

It seems more to me that they never provided proper third party integration to basically create a pkpass file encompassing

- a QR code embedding arbitrary text up to, say, 128B or something, usually ASCII characters and usually a ticket ID and/or URL

- 1-2 lines of supplementary "clear text"

- a logo and/or fancy color gradient if needed