Sending single push notification to multiple device tokens


I am using create-notification API to send push notifications to users in my project and retrieve-notification API for fetching the status of the notification. The status is crucial for me for some purpose.

I need following two details as they were not in the docs-

  1. For sending single notification to multiple device tokens in one call, we can include multiple tokens, but what is the limit and other parameters related to it?
  2. When retrieving status of such notification in one call, success/error is shown for only one of the tokens and not per token. We need status/data/error per token, how do we get that?

Making separate create and retrieve calls for each device token is highly in-efficient and a large overhead in large user base.

Please provide info on this.