Are you asking if we order an appetizer and dessert? Since it's included most of us will order both, even we don't eat the entire item.
Are you asking if everyone is entitled to one? You only get an appetizer and dessert if the menu has one. At least one CS doesn't have any desserts and some of the kids menus don't offer appetizers. A few of the sampler dessert and appetizer platters are sized and priced for sharing, if included at least two guests have to order the item.