Sure, I just made it public. It's in Portuguese, though, so if you need help I might try to guide you. Here's the link: https://webflow.com/website/caronaacademica
You'll find the menu in question on any page inside the folder "painel de controle".
To answer the suggestions:
vlogic: The invisible button is a possibility, but would be nice to have a cleaner way.
jwburkhard: there is no link settings on a list item.
vincent: I can't drag any link (block or text) inside a list, as the UI told me.
I think the best practice will be to make all the pages in that folder a single page with tabs, It's just that I have a limited time to work on it. Might be worth it though.