Hello,
Thanks for using our theme.
This mega menu https://prnt.sc/IcP2CAcoE8gH was created using static blocks, so go to Elementor > Settings > Post types, enable editor for static blocks and products, then edit Static blocks using Elementor.
Also, check Theme Options > Header Builder > Main menu and Dropdown settings.
if this is not what you are looking for, describe your request in more detail.
Regards