UIApplicationSupportsTabbedSceneCollection
A Boolean value indicating whether an app built with Mac Catalyst supports automatic tabbing mode.
Discussion
By default, the tabbing mode for an app built with Mac Catalyst that support multiple scenes is NSWindow.TabbingMode.automatic. Starting with macOS 12, you can disable this behavior by adding the UIApplicationSupportsTabbedSceneCollection key with a value of false to the UIApplicationSceneManifest key in your app’s Info.plist file.