I'm able to use Umbraco Helper to grab pages as IPublishedContent either by ID or by GUID. As I'm looking at the documentation, it appears to me I should be able to grab media as IPublishedContent in a very similar way:

https://docs.umbraco.com/umbraco-cms/reference/querying/umbracohelper

But GetPdfById and GetPdfByGuid most certainly return null. I don't know that I've struggled with Umbraco like this before. I feel like I'm pretty competent within Umbraco. This feels so basic. What the heck am I missing here?

using Microsoft.AspNetCore.Mvc;
using Umbraco.Cms.Core.Models.PublishedContent;
using Umbraco.Cms.Web.Common;

namespace UmbracoWebsite
{
    public class TestUmbracoHelperModel
    {
        public IPublishedContent GetPageById { get; set; }
        public IPublishedContent GetPageByGuid { get; set; }
        public IPublishedContent GetPdfById { get; set; }
        public IPublishedContent GetPdfByGuid { get; set; }
    }

    public class TestUmbracoHelperViewComponent : ViewComponent
    {

        private readonly UmbracoHelper _umbracoHelper;

        public TestUmbracoHelperViewComponent(UmbracoHelper umbracoHelper)
        {
            _umbracoHelper = umbracoHelper;
        }

        public IViewComponentResult Invoke()
        {
            TestUmbracoHelperModel TestUmbracoHelperModel = new()
            {
                GetPageById = _umbracoHelper.Content(1831),
                GetPageByGuid = _umbracoHelper.Content("6efa752a-1498-46c2-8b69-a5ea6630b274"),
                GetPdfById = _umbracoHelper.Media(2414),
                GetPdfByGuid = _umbracoHelper.Media("60ff3c64-535f-463c-8c64-6b16cf7f70fd")
            };

            return View($"/Views/Shared/Components/TestUmbracoHelper/TestUmbracoHelper.cshtml", TestUmbracoHelperModel);
        }
    }
}