So to sumup the information of the video tutorial https://youtu.be/Yz8q6JrOPXA,
in order to create a Single View app, in the create new project window, select “iOS”, then “App”.
In the options window, you need to select “UIKit App Delegate” for the option “Life Cycle” instead of the defaut SwiftUI App.
The Interface option remains SwiftUI and thelanguage optionSwift.
Click Next, and you should have you app identical to a Single View app, with all the files you need.