I don't think there's currently a tutorial for that - but the setup is pretty straight forward and works like other menu screens. You add the stats you want to be able to change, etc. right in the menu screen part.
Just keep in mind that they use value inputs, e.g. like a quantity selection or volume controls in option menus, i.e. you need to have an int value input prefab (e.g. via int slider or int button input) set up.
