Hello,

You can add the categories element in the header builder to achieve the category drop and add the main menu element in the center columns and configure the menu style “background”.

See the Screenshot for a better understanding:
https://ibb.co/bP3KWmC
https://ibb.co/BcvMY07

If you want to show this on specific pages, the Woodmart theme provides the option to create different headers for different pages and you need to create a separate header for these pages where you want to disable it.
https://xtemos.com/docs-topic/how-to-set-different-header-for-specific-page/

Best Regards.