Unable to receive Firebase Console manually sent notification (react-native[IOS])

Unable to receive manual notification sent from Firebase Console under cloud messaging for android / ios using react-native app

Able to receive notification send via back end server whenever the required task is complete & also notification send via Postman with the specified FCM Token are received.

Using react-native-firebase v5.6.0 and to listen to notification listenerfirebase.notifications().onNotification((notification: Notification) => {}) is being used andfirebase.notifications().displayNotification(displayNotifcation) is being used to display the incoming notification.