Dropdown in navbar

Hi, Somebody can help me with this, how to create dropdown within dropdown in navbar?

Here is my site Read-only:

https://preview.webflow.com/preview/moz-site-1?utm_medium=preview_link&utm_source=dashboard&utm_content=moz-site-1&preview=70a744103b92e7bd6360dc341d7742d6&workflow=preview

You have to put a “dropdown” inside “dropdown list”. after that is all about styling

Webflow-Moz-Site-1

although for ux reasons, I would suggest to work with a full screen nav menu or take a look at some “mega nav menus for web”