Catima - a FOSS loyalty card and ticket wallet for Android, which isn't tied to an Apple or Google account, and doesn't share data - is superb.

When we visited a museum yesterday, I bought a ticket online first, and their ticketing system offered me a ticket for an Apple device, in .pkpass format.

I downloaded it and opened it in Catima. And it worked perfectly, scanning the QR code to get in.

Thanks @nprofile1q...!

https://catima.app/