This is just for clarification because I don't think it does. Every time I create a project using a game template thing, there's no option to use SwiftUI. When you create the project, it uses Storyboards and UIKit.
Is SpriteKit compatible with SwiftUI?
Apple added a SpriteView to SwiftUI in Xcode 12 to show a SpriteKit scene in SwiftUI. It requires iOS 14 or macOS 11.