The Protect Document command is on both the Tools menu and the Review tab – but the Restrict Permission tool from the Review tab is on the File menu instead.
You get both a Table menu and a set of Table commands on the Insert tab of the ribbon in Word 2016, and the Tools menu and Review tab have almost the same set of commands – but not quite.
That’s not just the file management tools on the File menu where you’d expect them (there’s a File menu in Office 2013 too, which has the options for each program, whereas Office 2016 keeps Preferences on the Apple menu where Mac users will look for them). If anything, Office 2016 is almost too much of a Mac application, because instead of putting everything on the ribbon the way Office does on Windows, it both splits and duplicates features between the ribbon and the menus.