I would suggest a feature request, but I doubt there's enough awareness to get buy-in.
I do not see Course events in my subscription list, but I do see them in the API docs.
Live Events is experimental, and so it seems the topic is very very quiet, which is obvious if you do a search here. This thread has been stale for a month. 
I too am trying to dive in. Started today with a ticket to support, because I see conflicting documentation between these two resources.
Live Events (experimental) - Canvas LMS REST API Documentation
What Live Events extensions can I subscribe to in the Canvas Data Portal?
I emailed my ticket number to our CSM and also asked to speak to a Canvas Engineer. I say if they are going to post experimental invite only features, early adopters and Canvas need to bridge the communication. Maybe we can start a troubleshooting thread.
PS. Also, Live Events needs to be rebranded, because CanvasLIVE Events creates too much noise and confusion for Live Events in the community search.
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