How to push open a page from a notification flutter - flutter

Question

I have my method that loads firebase cloud messaging and listens for incoming messages as follows.
void loadFCM() async {
if (!kIsWeb) {
channel = const AndroidNotificationChannel(
'high_importance_channel', // id
'High Importance Notifications', // title
importance: Importance.high,
enableVibration: true,
);
flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin();
/// Create an Android Notification Channel.
///
/// We use this channel in the `AndroidManifest.xml` file to override the
/// default FCM channel to enable heads up notifications.
await flutterLocalNotificationsPlugin
.resolvePlatformSpecificImplementation<
AndroidFlutterLocalNotificationsPlugin>()
?.createNotificationChannel(channel);
/// Update the iOS foreground notification presentation options to allow
/// heads up notifications.
await FirebaseMessaging.instance
.setForegroundNotificationPresentationOptions(
alert: true,
badge: true,
sound: true,
);
}
}
void listenFCM() async {
FirebaseMessaging.onMessage.listen((RemoteMessage message) {
RemoteNotification? notification = message.notification;
AndroidNotification? android = message.notification?.android;
if (notification != null && android != null && !kIsWeb) {
flutterLocalNotificationsPlugin.show(
notification.hashCode,
notification.title,
notification.body,
NotificationDetails(
android: AndroidNotificationDetails(
channel.id,
channel.name,
icon: 'launch_background',
),
),
);
if (message.data['screen'] == 'chat') {
Navigator.of(context).push(
MaterialPageRoute(
builder: (context) => ChatScreen(
uid: message.data['uid'],
),
),
);
}
}
});
}
As seen I'm storing the screen I want in the data of the screen I want when I send the message and have code in the listenFCM function to attempt to change the screen but it wont work, I receive the notification but dont change screen. I'm currently using this method to send a message to a specific user
void sendPushMessage(String token, String body, String title) async {
try {
await http.post(
Uri.parse('https://fcm.googleapis.com/fcm/send'),
headers: <String, String>{
'Content-Type': 'application/json',
'Authorization': 'key=${api}',
},
body: jsonEncode(
<String, dynamic>{
'notification': <String, dynamic>{'body': body, 'title': title},
'priority': 'high',
'data': <String, dynamic>{
'click_action': 'FLUTTER_NOTIFICATION_CLICK',
'id': '1',
'status': 'done'
'screen': 'chat'
},
"to": token,
},
),
);
} catch (e) {
print("error push notification");
}
}
Im trying to modify it so I can send a push notification they open a chat page. it would be a chat(userid) sort of thing but I dont want to send the chatId in the body of the notification or anything so how can I have my app push open my chat page when tapped from app close/open etc, Thanks for reading!