From a user standpoint, Live Events are meetings. Unlike regular meetings, there's no reliable ways of listing all of the Live Events a user has access to from the Graph API.
Currently, I was only able to find one reliable way to get details about a Live Event and it required going through the https://learn.microsoft.com/en-us/graph/api/onlinemeeting-get?view=graph-rest-1.0&tabs=http#examples paired with the videoTeleconferenceId, meeting Id, joinWebUrl or joinMeetingId. This is useful if you already know the Live Event you want to get details on, but it's not enough to be able to list the Live Events of a user.
The business need that would be met with this endpoint is to list all meetings a user is expected to attend, without relying on Live Event producers to share the JoinWebUrl in the right channel. It would also be a good tool to retrieve relevant recordings after the Live Event is over.