Menufy requires items to be in a category to show on the site. Please put all your items into their own category, and they will begin to show up on the Menufy website. Also verify that the item is enabled and in-stock on both your clover device and in Menufy Manager website's menu.
Note: Menufy is limited to 2,000 items. Any restaurant that has over 2,000 items will not be able to list all their items online.