I am using FCM Cloud Messaging framework to send and receive push messages for both Android and ios. To send messages from my server I call FCM v1 API. I use FCM SDK app in my native app (react native based) to generate device registration token, etc.I am trying to find ways where the push messages show grouped in device system tray like on Whatsapp i.e. messages containing a particular unique id should be grouped under one category e.g. all messages for a particular stock ticker showing under one group, etc.When searching for possible solutions I came across various links such as:
Group fcm notifications like whatsapp but allowing multiple group notifications
But none of those helped. For example sending "tag" field replaces previous message when new one is received with the same value. Moreover when app is closed none of the message handling functions of native app are executing on the device so I believe this should be purely a server side functionality. On FCM docs page there is no reference to grouping of messages.
https://firebase.google.com/docs/reference/fcm/rest/v1/projects.messages
Any suggestions on how to implement this ?