MenuItem.example is only defined for a DEBUG build.
Uploading to the App Store uses a Release build, so MenuItem.example does not exist.
Try replacing:
#if DEBUG
static let example = MenuItem(id: UUID(), name: "Maple French Toast", recipe: "Breakfast Icecream", ingredient: "Sweet, fluffy, and served piping hot, our French toast is flown in fresh every day from Maple City, Canada, which is where all maple syrup in the world comes from. And if you believe that, we have some land to sell you…", instruction: "Cook it", emTipTitle: "Energy management", emTip: "Practice 5 minute rule")
#endif
with:
static let example = MenuItem(id: UUID(), name: "Maple French Toast", recipe: "Breakfast Icecream", ingredient: "Sweet, fluffy, and served piping hot, our French toast is flown in fresh every day from Maple City, Canada, which is where all maple syrup in the world comes from. And if you believe that, we have some land to sell you…", instruction: "Cook it", emTipTitle: "Energy management", emTip: "Practice 5 minute rule")