STEP 1: How to trigger a Popup from a Nav menu item?
You can have a mega menu type of navigation, using the Popup Elementor feature. Please check the detailed tutorial below:
STEP 2: How to edit the Shop Online popup mega menu?
The "Shop Online" navigation item leads to a popup named "Shop Online Mega Menu". You can locate this template in Dashboard > Templates > Popups.
Click on "Edit with Elementor" to edit the menu, images, button's link, etc.