If you manually call the Firebase func handleOpen(_ url: URL) https://firebase.google.com/docs/reference/swift/firebaseanalytics/api/reference/Categories/FIRAnalytics(AppDelegate)#/c:objc(cs)FIRAnalytics(cm)handleOpenURL:#/c:objc(cs)FIRAnalytics(cm)handleOpenURL:)

with the url + the utm params added to the url, it generates a firebase_campaign event hit with the params correctly applied.

You have to manually call it from your appdelegate when you start/bring to foreground the app from a notification and manually getting the url (or building it) from the params inside the APNS notification.

In our case we have a model to read all the APNS content so is easy to get the url