However, I do wish it would also accept PDF files (planning a trip right now and many museums just give you a PDF), as well as that it had some level of in-app organization. I have a lot of items and it's just one live. I suspect I need to use the calendar function to do the latter.
Airlines don't always give pkpass. Just a PDF and itinerary just parses them correctly.
You can try your PDF and see if its already working or not.
If not then reach out to vkrause on KDE matrix, send him a copy of PDF and he will fix the code right away.
I've traveled a lot on airplanes and every often I get a new airline whose PDF isn't quite parsing properly. I send them a file and it gets fixed.
You can also do one thing, in order to test the app, if you have old PDF files, try to import them.