Remove route from RouteCollection in Asp.Net Core and add new with same route name (nopCommerce-4.00)

I want to remove existing route from RouteCollection and want to add new route with same route name in nopCommerce 4.00 via plugin

Existing route name:

//home page
            routeBuilder.MapLocalizedRoute("HomePage", "",
        new { controller = "Home", action = "Index" });

I Want to replace it with

   routeBuilder.MapLocalizedRoute("HomePage", "",
    new { controller = "CustomPage", action = "Homepage" });

I tried several ways but not get any luck.

In my case, I have to replace the robots.txt generation. I created a new public controller in my plugin, and I copy the original action here:

public class MiscCommonController : BasePublicController
{
    #region Fields
    private readonly ICommonModelFactory _commonModelFactory;
    #endregion Fields

    #region Ctor
    public MiscCommonController(
        ICommonModelFactory commonModelFactory
        )
    {
        this._commonModelFactory = commonModelFactory;
    }
    #endregion Ctor

    #region Methods
    //robots.txt file
    //available even when a store is closed
    [CheckAccessClosedStore(true)]
    //available even when navigation is not allowed
    [CheckAccessPublicStore(true)]
    public virtual IActionResult RobotsTextFile()
    {
        var robotsFileContent = _commonModelFactory.PrepareRobotsTextFile();
        return Content(robotsFileContent, MimeTypes.TextPlain);
    }
    #endregion Methods
}

After this I create a RouteProvider for my plugin, and I replaced the original route to my own one.

public partial class RouteProvider : IRouteProvider
{
    /// <summary>
    /// Gets a priority of route provider
    /// </summary>
    public int Priority => -1;

    /// <summary>
    /// Register routes
    /// </summary>
    /// <param name="routeBuilder">Route builder</param>
    public void RegisterRoutes(IRouteBuilder routeBuilder)
    {
        Route route = null;

        foreach (Route item in routeBuilder.Routes)
        {
            if (item.Name == "robots.txt")
            {
                route = item;
                break;
            }
        }

        if (route != null) routeBuilder.Routes.Remove(route);

        routeBuilder.MapRoute(
            "robots.txt",
            "robots.txt",
            new { controller = "MiscCommon", action = "RobotsTextFile" }
        );
    }
}

That's all.

After this implementation, the routing works fine, and the get request landed in my own controller, which is act like the original.

Now, I can replace the generation logic with my own.

I hope it helps.