In the event dashboard, click on the "Content" tab from the sidebar.

Select the "People" feature page to manage the content. 

Click on “Add Tab”. This will open a modal to add a tab.

Select the Group to show and enter the display name of the tab. You can also choose to show only logged-in users from the group you are selecting.

You can add multiple tabs for different groups of people in your event in a similar manner.

How to add multiple tabs showing different groups of people to the people listing?