If you mean that you want the main menu item to link to a page and have the sub menu we defined, yes.
I only told you to create the menu item using a link item with # in the URL, because I thought you only wanted to have the Sub menu.
But you can create a mega menu sub menu in any regular menu item. So for example, you can add a category page to your menu, then open the category page menu item, and give is a sub / mega menu using the previous method.