I am working on a custom admin tool which uses mutliple controllers and views. 

I have created a Menu Provider class which sucessfully displays the top-level item in the Settings sidebar. Clicking it displays the entry point route as configured in the provider. However, I have other routes within the the admin tool that I want to use too. When I navigate to one of these other routes, I want to keep the sidebar navigation visible with my menu item displayed as active.

 
This code for the privider:

[MenuProvider]
public class ExampleToolMenuProvider : IMenuProvider
{
    public IEnumerable<MenuItem> GetMenuItems()
    {
        var example = new UrlMenuItem("Example", MenuPaths.Global + "/cms/admin/example/",
            "/example/index/")
        {
            IsAvailable = _ => true,
            SortIndex = 61,
            AuthorizationPolicy = CmsPolicyNames.CmsAdmin

        };

        return new List<MenuItem>(1)
        {
            example
        };
    }
}

Here's what it looks like when I select it from the menu:

My goal is that when clicking 'Two', I would be taken to the new route but mainting the 'Example' option active in the sidebar. However, the sidebar does not load, it looks like so...



Here's the controller with a MenuItem attribute on the index Action

[Authorize(Roles = Roles.CmsAdmins)]
[Route("/example/two/")]
public class TwoController : Controller
{
    [Route("[action]")]
    [HttpGet]
    [MenuItem(MenuPaths.Global + "/cms/admin/example/", Url = "/example/two/index/")]
    public IActionResult Index()
    {       
        return View("~/Index.cshtml");
    }
}

Am I doing anything wrong with the declaration of the MenuItems? I have followed the docs here - https://docs.developers.optimizely.com/content-management-system/docs/adding-and-configuring-menu-items - but did not have any luck.

Note, there is a comment on this blog post about the new menu system which is similar to my issue - https://world.optimizely.com/blogs/matthew-slim/dates/2023/6/new-menu-system-released/ 

Erik's workaround here was to 'hack' the  Html.CreatePlatformNavigationMenu() like so:

    var platformNavigation = Html.CreatePlatformNavigationMenu() as HtmlString;
    var platformNavigationContent = platformNavigation.Value.Replace("data-epi-product-id=\"\"", "data-epi-product-id=\"global_cms\"");
    platformNavigation = new HtmlString(platformNavigationContent);

This almost works, it shows 'a navigation'. However, for me, this just shows the root cms navigation sidebar, it does not show the admin sidebar with my menu item as active. 

 Does anyone have any experience with this? 

Thanks in advance