Making a themer template url into a clickable/viewable page

I need some help please on how to make a f1themelayout, campaigns page a clickable url to use in the menu navigation. The link below looks like this (taken from when viewing page via campaign/themer layouts) but if I create a new menu item in Appearance, menu and use it as the custom link it just takes me to the homepage of the site on the live version.
This is the link

The fl-theme-layout post type is not public, its used internally so you can edit the layout then apply it to locations, only you the admin can actually view the layout to edit it.