Please follow the steps below to know how to create a mega menu as our demo.
Pls go to Wp-admin > Appearance > Menus > Select your main menu
By toggling each menu item, you will see a "Menu Options" button > click on it to see all available options
In the menu options, please enable Mega Menu
Here you can configure submenu alignment: Right, Left, Center, Container, or Full.
After enabling Mega menu, you'll be able to create your own mega menu by using the menu builder below.
Click to manage columns and add appropriate elements.