Nav Menu Working on preview but not when published

Hi There,

The nav menu on my mobile site is functioning correctly when I toggle on the preview in the designer, but it the menu isn’t showing on the actual published site. I’ve viewed it in both Chrome and Safari on my iphone, and checked the z-index as other posts suggested.

Here is the read only link, is anyone able to give me some guidance?

Thank you!

Here is my site Read-Only: LINK
(how to share your site Read-Only link)