If you’re looking to get a count of ‘notification_open’ events per message ID, you would first need to ensure that you’re logging the ‘message_id’ parameter with the ‘notification_open’ events. Assuming that you’re doing so, you should be able to access these logs on your Firebase Console.
If you navigate to the ‘Events’ tab under ‘Analytics’ in the Firebase Console, you will see a list of your logged events. Find the ‘notification_open’ event in this list and click on it. This will open a detailed view of the event, and from here, you want to look for the ‘Event Parameters’ section.
Within the ‘Event Parameters’ section, you should see the ‘message_id’ parameter (assuming it is being logged with the event). By clicking on this, you should be able to view a count of ‘notification_open’ events per each unique ‘message_id’ being logged with the event.
If you’re not seeing the ‘message_id’ parameter or not seeing the data you’re expecting, you may need to double-check your event logging code to ensure the ‘message_id’ is being correctly logged with each ‘notification_open’ event.
Remember that it may take up to 72 hours for event data to appear in the Firebase Console so if you’ve recently implemented this logging, you may need to wait a few more days to see the data.