Change dropdown style

Hi, my site setup is currently utilizing the standard unedited drop down style, but I'd like to customize it to something closer to the attached photos. The 1st pic is a screenshot of the top menu on another site & then the 2nd is a screenshot of that site when you hover over one of the menu items.

Pic 1:

Pic 2:

Basically instead of just showing the titles of the sub-headers when you hover over a menu item, I'd like it to display photos of the different sub-headers.

Any help pointing to something either out of the box that Squarespace offers for that or custom coding is much appreciated!

thanks

Here's maybe a better example of what I'd like to do. Seems like Squarespace would require custom code for this, so I'd be very grateful for any advice on which direction to look for that.

Hi. You can use Mega Menu Plugin.