An attendee list shows all users that have signed in in the app and have given permission to be in this list. Through the profile page, that opens when clicking an name in the list, attendees can also send personal messages to each other. This is only possible if an attendee has given consent to receive personal messages.
Adding an attendee list to your event
In the configurator, you can add an attendee list to your event in two ways:
Create a dedicated home menu button for it and link it to My Congress > Attendee list.
In a navigation page of the type Menu, you can also link one of the items to My Congress > Attendee list. A possible structure could be to have one home menu button Networking, and below that a navigation page with links to the attendee list, the user's chat overview, and the event feed.
Besides linking an item, you don't have to do anything to enable the list.