The Main Menu for the e-Commerce mobile site is a separate menu, managed just like your desktop main menu.
To manage the menu items: login to the back-end and then navigate to “Menu >> mobilemain”.
Note: Special care should be taken to make sure that the pages you link to for your mobile site are optimized for the mobile environment.
Be sure to check your changes on a mobile device!
For more information on managing your menu items, see https://help.stoysnet.com/content-management/menu-manager