Hello,

First of all thanks for choosing our Theme, we are glad to be you in the WoodMart WordPress family :-).

I saw the screenshots you attached. To populate the main navigation drop-downs you need to Create an HTML Block from Dashboard >> HTML Blocks.

Screenshot for Clarification: https://ibb.co/crhLMWx

Then you need to add the shortcode of the HTML Block to the menu item from Appearance >> Menus >> Main Menu >> Edit Item >> HTML Block as Dropdown

Screenshot for Clarification: https://ibb.co/jV2thrg

Best Regards.