Hidden area of pages that includes the navigation pane

[da-sypha]

I would like to have a hidden area with a bunch of pages, including navigation on the left... basically a hidden tab. Is this possible at all? (I've looked at the docs, plugins, and discussions, but can't find anything, apologies if I've missed it).

I've thought of hiding the tab with CSS, putting it as the final tab, then on the final page of the penultimate tab, hiding the footer navigation for next page, but thought that might be a bit hacky.

Even though the reader could use dev tools to find the hidden tab, we prevent access with some server authentication.

Many thanks in advance for any advice.

[da-sypha]

Just to add, as to why I would like this, we demo features to select customers and want only them to access for the pilot. It's fine for single pages (we just don't state in mkdocs.yml), but when it's for a new product with a bunch of pages, it would be nice to have some navigation for the pages.