Hello,
Dummy content includes default menu example, not for every single demo because users edit menu items according to their needs. If you need any of the additional pages from our demo you can import them via XStore > Import Demos > scroll to Additional pages import area and choose the page you need > press import. We don’t include a lot of pages to dummy content to avoid flooding of clients’ sites by third-party content and allow to client to choose what pages he needs and import.
If you need to edit the mega menu according to your needs enable WPBakery editor for the static block post type https://xstore.helpscoutdocs.com/article/47-static-blocks and go to Static Blocks > edit menu static blocks. Watch the video tutorials for detailed information https://youtu.be/f07MBdnFPfk
Regards