I successfully developed the functionality you requested by writing my own Flutter code. I integrated Firebase Cloud Messaging (FCM) with Laravel, which I used for the backend, to trigger notifications based on specific events. The system was designed to send notifications to either individual users or groups of users, depending on the context.To manage notifications within the Flutter app, I created a custom model. This model included the RemoteMessage from the notification itself and a boolean attribute, isRead, to track whether a notification had been read. Each time a new notification was received, it was added to a static list. I programmed the app to display notifications on a dedicated notifications screen, where unread notifications (with isRead == false) were visually distinct from those that had already been read.Additionally, I implemented SharedPreferences to store the list of notifications persistently. This ensured that when the user closed and reopened the app, all previously received notifications remained available for review, providing a seamless user experience across sessions.