From your course home page, scroll down and click on Settings.
From Settings, click on Navigation
Once in Navigation, scroll down until you see the Top Hat page. Click the 3 dots and select Enable. After selecting Enable, the Top Hat page will move up to the Enabled page section. Make sure you scroll to the bottom of the page and click Save before navigating away from this page.
Return to you course home page. Top Hat should now appear as a menu item.