How do I process a push notification received while app is closed or in backgrounding iOS?

Long story short - push notifications are working. When I receive a notification while app is running, I call HandleOnRemoteNotificationReceived and set an indicator on an icon IN my app to notify the user. However, if a remote notification is received while app is closed, or background, I can't seem to determine that. The app gets a badge icon - but I can't seem to find a way to determine in OnApplicationFocus if there is a badge on the icon so I can turn the indicator on in the app. UnityEngine.iOS.NotificationServices.remoteNotificationCount returns 0 unless I receive the notification while the app is running.