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 nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqjvdpz4ph7nqe3c47hcpgtymzd79y3nw49qp85e3ehn5df9em4jqsry7kp4 (nprofile…7kp4)!
https://catima.app/