You can add social media links and enable/disable social media on the header from here.

• Go to Appearance > Customize > General Settings > Social Media
• Enable Social Links. Blue is enabled. When you enable the social links, social media icons will be displayed in the header.
• Click “Add new links” button to add a social media icon.
• Enter the icon and link for the social media. Click on a link to edit it. Click on “Remove” to remove a social icon.
• Click Publish.