Private Endpoint support for User Defined Routes (UDRs) is now in public preview. This feature enhancement will provide you with the ability to apply custom routes to traffic destined to a private endpoint with a wider subnet range. In order to leverage this feature, you will need to set a specific subnet level property, called PrivateEndpointNetworkPolicies, to Enabled. In addition to toggling this property, you will need to also register for the Microsoft.Network/AllowPrivateEndpointNSG feature (note that registation time may take up to 15mins).
This feature is available in the following regions:
UsEast2Euap, UsCentralEuap, WestCentralUS, WestUS, WestUS2, EastUS, EastUS2, Asiaeast, Australiaeast, Japaneast, Canadacentral, Europenorth, Koreacentral, Brazilsouth, Uksouth, US South, US North, France Central
Managing Private Endpoint Network Policies.
Managing network policies for private endpoints - Azure Private Link | Microsoft Docs
Registering for feature:
CLI - az feature | Microsoft Docs
PS - Register-AzProviderFeature (Az.Resources) | Microsoft Docs
Overview of User Defined Routes.
Azure virtual network traffic routing | Microsoft Docs
How it Works.
Route network traffic - tutorial - Azure portal | Microsoft Docs
Create, change, or delete an Azure route table | Microsoft Docs
What is Private Link?
What is Azure Private Link? | Microsoft Docs