1. You’re not supposed to control the scenes. Instead, you’re supposed to control the views. You can use to display views vertically, and to display view horizontally. Then, wrap the main view (the view that contains the child views) in the .
Left: VStack, Right: HStack

2. I think you’re mixing up scenes with views. Switching from one scene from another is automatically managed, and all you have to use is SceneStorage. (This is basically a way to store the individual state of each scene, for example, the selected tab in a tab bar application.) See App essentials in SwiftUI at 10:56.

3 (a). This is also managed automatically, in response to a user gesture or clicking a menu item.

3 (b). WindowGroup manages all the scenes for you. Yes, it is a set of views, but it does everything automatically (for example, providing multiple-window functionality for iPadOS).

4. Just go with the flow. WindowGroup does everything automatically for you. You can check out these links for more information.

Thanks for the comment!

WWDC21 Scholar. I like to read manga and write about Swift. Check out my app, Find — look for text in real life, with outrageous speed. getfind.app

WWDC21 Scholar. I like to read manga and write about Swift. Check out my app, Find — look for text in real life, with outrageous speed. getfind.app