The details say “The theme comes bundled with an optional plugin which you can activate for easy menu management.”
This will allow you to customize menus like lunch, dinner, wine, cocktails, dessert. Likely a great feature for a restaurant!
Without downloading the template myself, I don’t know for sure, but if you look in the plugins tab, it should highlight optional plugins at the top. I’ve seen this in other themes I’ve used where it’s recommended to use a certain plugin.
Hope that helps! Keep me posted.