URL Opening Swift App - Open Works - Called Function Does NOT work

I just found a solution here: application(...continue userActivity...) method not called in ios 13

The trick is to also implement the SceneDelegate.swift functions for Apps with iOS > 13. This function should be called if you open the URL confirmevent://HelloWorld:

func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>) {
    print(URLContexts.debugDescription)
}