Hello Project type "Life Cycle: UIKit App Delegate" doesn't exist within Xcode 13.2.1 What can we do then ?

Hello how do you manage this issue with Xcode 13.2.1 as SceneDelegate.swift doesn't appear anymore in the file list ? SwiftUI/EnvironmentObject.swift:70: Fatal error: No ObservableObject of type ToDoStorage found. A View.environmentObject(_:) for ToDoStorage may be missing as an ancestor of this view.