To display social links you just need to add custom links pointing to your social media profiles.
So, the first step would be to create a new menu. “Go to WordPress Dashboard > Appearance > Menus” and click on “create a new menu” link. Enter a Menu Name (for example “Social”) and click on the Create Menu button.
Add custom links to this menu, use the “Links” box as shown in the following screenshot. Just make a link to the social media profiles you want to display.
Click on the Save Menu button.
Next, click on “Manage Locations” tab and select the menu that was just created in the “Social Menu” drop-down list and click on the ‘Save Changes” button.
Here is the list of supported social media sites: