Hello @dreamtechzone_5
Navigate to Online Store > Themes > click on Edit code.
Locate and open the theme.css or base.css file. Scroll to the bottom and add the following CSS code:
#mega-menu-mega_menu_FrEa3d {
column-list-max-width: 100% !important;
}
.mega-menu__nav {
justify-content: center;
}
Result:
