The documentation says:
"When you send a
Response, you should include the state of the interface properties in the
context of the message." in https://developer.amazon.com/docs/device-apis/alexa-discovery.html#discoverresponse
But it doesn't contain any example of how to include multiple reports in one Context. All the examples of Context containing state report data are for directives targeting a particular appliance, group or scene but the Discovery response include all the appliances.
Our second certification for v3 is blocked until we can confirm what is the expectation and how to report states in a Discovery Response.