Fetching Analytics Related To Push Notification In `fcm Cloud Messaging`

I want to know whether push notifications are delivered to all the registrationId mapped to my user database or not. I have 8000 users and all are having registrationId. I had sen

Solution 1:

There is currently no API to retrieve the delivery status for sent FCM messages.

In general, when the FCM server successfully receives the payload you've sent from your App Server, it should return a success:1 response along with a message_id.

If what you're aiming for is to know if the device has successfully received the message, you should implement Delivery Receipts:

Delivery Receipt: If the app server included delivery_receipt_requested in the downstream message, the XMPP connection server sends a delivery receipt when it receives confirmation that the device received the message.