v9: 10540 Resolving UmbracoHelper in middleware was null

src/Umbraco.Infrastructure/PublishedContentQueryAccessor.cs

@@ -0,0 +1,17 @@
+using System;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace Umbraco.Cms.Core
+{
+    public class PublishedContentQueryAccessor : IPublishedContentQueryAccessor
+    {
+        private readonly IServiceProvider _serviceProvider;
+
+        public PublishedContentQueryAccessor(IServiceProvider serviceProvider)
+        {
+            _serviceProvider = serviceProvider;
+        }
+        public IPublishedContentQuery PublishedContentQuery => _serviceProvider.GetRequiredService<IPublishedContentQuery>();
+
+    }
+}