Presenters can view a list of Live Presentation attendees either during or after their Live presentation is complete.
To view the list of attendees during a presentation, click the attendee icon shown in the top right corner of their slides when they're in Live mode. See animation below.
If you want to access the list of attendees after the presentation, you can do so by clicking back on the green Live Presentation button in the lower right corner of the playback page. Then choose the option shown below: