I'm trying to make the app open automatically when it receive the push notification, i am using Firebase Cloud Messaging and i've already read here about the same problem but i don't quite understand on how to use it for flutter

Solution 1: Omatt

It's not possible to automatically launch the app once a notification has been received from Firebase Cloud Messaging. As mentioned in the docs, payloads received while the app is in the background can only be handled when the user taps on the notification.