Popup parent is null

Question

In my wpf application, I have some popups (menuContext and dialog) that haven't a parent. But when I open Snoop They have a visual Parent

To get the parent I am using this code:

 public static DependencyObject GetParent(this DependencyObject element)
        {
            DependencyObject dependencyObject;
            try
            {
                dependencyObject = VisualTreeHelper.GetParent(element);
            }
            catch (InvalidOperationException )
            {
                dependencyObject = (DependencyObject) null;
            }
            if (dependencyObject == null)
            {
                var testec = element.GetName().Contains("Main");
                if (element is FrameworkElement frameworkElement2)
                    dependencyObject = frameworkElement2.Parent;
                if (element is FrameworkContentElement frameworkContentElement2)
                    dependencyObject = frameworkContentElement2.Parent; 
            }
            return dependencyObject;
        }

Why for some popups the parent is null? what can I add to this code to get parent =/= null ? Thanks
I am looking to find the direct parent of popup. I need this to set automationId like this : MainWindow....Parent.Popup.