turns off the endpoint matching logic - makes it configurable since it shouldn't be needed

src/Umbraco.Core/Configuration/Models/WebRoutingSettings.cs

@@ -10,6 +10,17 @@ namespace Umbraco.Core.Configuration.Models
     /// </summary>
     public class WebRoutingSettings
     {
+        /// <summary>
+        /// Gets or sets a value indicating whether to check if any routed endpoints match a front-end request before
+        /// the Umbraco dynamic router tries to map the request to an Umbraco content item.
+        /// </summary>
+        /// <remarks>
+        /// This should not be necessary if the Umbraco catch-all/dynamic route is registered last like it's supposed to be. In that case
+        /// ASP.NET Core will automatically handle this in all cases. This is more of a backward compatible option since this is what v7/v8 used
+        /// to do.
+        /// </remarks>
+        public bool TryMatchingEndpointsForAllPages { get; set; } = false;
+
         /// <summary>
         /// Gets or sets a value indicating whether IIS custom errors should be skipped.
         /// </summary>