How to create a real custom Output window?

I’d like to create an extra, custom Output Window for MSVC 2022 for some extended login purposes. I’ve followed this article, implementing such a code:

using Microsoft.VisualStudio.Shell;
using Microsoft.VisualStudio.Shell.Interop;
using System;
using System.ComponentModel.Design;
using System.Globalization;
using System.Threading;
using System.Threading.Tasks;
using Task = System.Threading.Tasks.Task;
using Microsoft.VisualStudio;

namespace VSIXProject9
{
    /// <summary>
    /// Command handler
    /// </summary>
    internal sealed class My_Output_Wnd_1
    {
        /// <summary>
        /// Command ID.
        /// </summary>
        public const int CommandId = 0x0100;

        /// <summary>
        /// Command menu group (command set GUID).
        /// </summary>
        public static readonly Guid CommandSet = new Guid("e19c8dcd-4193-4104-b858-d3a7a29166c6");

        /// <summary>
        /// VS Package that provides this command, not null.
        /// </summary>
        private readonly AsyncPackage package;

        /// <summary>
        /// Initializes a new instance of the <see cref="My_Output_Wnd_1"/> class.
        /// Adds our command handlers for menu (commands must exist in the command table file)
        /// </summary>
        /// <param name="package">Owner package, not null.</param>
        /// <param name="commandService">Command service to add command to, not null.</param>
        private My_Output_Wnd_1(AsyncPackage package, OleMenuCommandService commandService)
        {
            this.package = package ?? throw new ArgumentNullException(nameof(package));
            commandService = commandService ?? throw new ArgumentNullException(nameof(commandService));

            var menuCommandID = new CommandID(CommandSet, CommandId);
            var menuItem = new MenuCommand(this.Execute, menuCommandID);
            commandService.AddCommand(menuItem);

            ///////////////////////////////

            IVsOutputWindow outWindow = Package.GetGlobalService(typeof(SVsOutputWindow)) as IVsOutputWindow;

            // Use e.g. Tools -> Create GUID to make a stable, but unique GUID for your pane.
            // Also, in a real project, this should probably be a static constant, and not a local variable
            Guid customGuid = new Guid("0F44E2D1-F5FA-4d2d-AB30-22BE8ECD9789");
            string customTitle = "Custom Window Title";
            outWindow.CreatePane(ref customGuid, customTitle, 1, 1);

            IVsOutputWindowPane customPane;
            outWindow.GetPane(ref customGuid, out customPane);

            customPane.OutputString("Hello, Custom World!");
            customPane.Activate(); // Brings this pane into view
        }

        /// <summary>
        /// Gets the instance of the command.
        /// </summary>
        public static My_Output_Wnd_1 Instance
        {
            get;
            private set;
        }

        /// <summary>
        /// Gets the service provider from the owner package.
        /// </summary>
        private Microsoft.VisualStudio.Shell.IAsyncServiceProvider ServiceProvider
        {
            get
            {
                return this.package;
            }
        }

        /// <summary>
        /// Initializes the singleton instance of the command.
        /// </summary>
        /// <param name="package">Owner package, not null.</param>
        public static async Task InitializeAsync(AsyncPackage package)
        {
            // Switch to the main thread - the call to AddCommand in My_Output_Wnd_1's constructor requires
            // the UI thread.
            await ThreadHelper.JoinableTaskFactory.SwitchToMainThreadAsync(package.DisposalToken);

            OleMenuCommandService commandService = await package.GetServiceAsync(typeof(IMenuCommandService)) as OleMenuCommandService;
            Instance = new My_Output_Wnd_1(package, commandService);
        }

        /// <summary>
        /// This function is the callback used to execute the command when the menu item is clicked.
        /// See the constructor to see how the menu item is associated with this function using
        /// OleMenuCommandService service and MenuCommand class.
        /// </summary>
        /// <param name="sender">Event sender.</param>
        /// <param name="e">Event args.</param>
        private void Execute(object sender, EventArgs e)
        {
            ThreadHelper.ThrowIfNotOnUIThread();
            string message = string.Format(CultureInfo.CurrentCulture, "Inside {0}.MenuItemCallback()", this.GetType().FullName);
            string title = "My_Output_Wnd_1";

            // Show a message box to prove we were here
            VsShellUtilities.ShowMessageBox(
                this.package,
                message,
                title,
                OLEMSGICON.OLEMSGICON_INFO,
                OLEMSGBUTTON.OLEMSGBUTTON_OK,
                OLEMSGDEFBUTTON.OLEMSGDEFBUTTON_FIRST);
        }
    }
}

but definitely NOT get what i’ve expected. The code here DO NOT create an extra, separate output window, BUT only creates so called "panel" for an existing Output window:

This panel is just a kind of sub-frame opened from "Select output from:" rollout WHILE what i want to get is, as stated earlier just another, separate output window like:

that can be moved/docked/placed inside the whole IDE window just like the original Output window, Call Stack or Breakpoints windows.

Is there a way to to achieve what i need?