Answer in this stackoverflow resolved this issue for our app. Essentially sharing PDF from Safari has two ActivationRules both PDF and URL, with Info.plist above you are limiting it to be only one ActivationRule and if it has more than one the app will not show up.
LANcort
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Last seen
User for
From
Chicago, IL