Upon checking, you have added the icon on the menu area but the URL is not added. Please go to Appearance > Menu > Select Your Primary Menu: Add the URL to the ICON custom Link. See attached screenshot.
The URL you have added on Appearance > Customize > Social will work on Top Bar. You can set Topbar to ON viaAppearance > Customize > Header > Topbar.
That worked. What’s interesting is that before I upgraded to the latest X Theme and Cornerstone that this was populated. I can’t say a 100% for sure. Anyway, thanks for the help!