For WordPress:

To setup your social links menu. While in your WordPress Dashboard, go to Appearance > Menus. Create a new menu Name it Social. Check ‘Social’ under theme location. Finally, add custom links to your menu. For example: https://x.com/yourusername Be sure to click the ‘Save Menu’ button to save your menu. Our themes support most social networks. If we are missing one, you can request it here.

For Ghost:

Your site’s navigation menu can be updated directly in Ghost Admin from the Settings > Site > Navigation > Secondary Navigation section. By clicking on Customize, a new menu will pop up which allows you to add or edit items in your primary & secondary navigation.