AKS: add list of supported Azure regions

Author: sethmanheim

AKS-Arc/cluster-architecture.md

@@ -2,11 +2,12 @@
 title: AKS Arc and workload cluster architecture
 description: Learn about AKS Arc and workload cluster architecture.
 ms.topic: overview
-ms.date: 05/29/2024
+ms.date: 02/28/2025
 author: sethmanheim
 ms.author: sethm 
 ms.reviewer: rbaziwane
 ms.lastreviewed: 05/29/2024
+ms.custom: references_regions
 
 ---
 
@@ -76,6 +77,10 @@ AKS is now part of Azure Local starting from version 23H2. The lifecycle managem
 
 For more information, see the [Update overview for Azure Local, version 23H2](/azure-stack/hci/update/about-updates-23h2).
 
+## Region availability
+
+AKS on Azure Local is supported in the same regions in which Azure Local is available. For more information about supported Azure regions, see [System requirements for Azure Local](/azure/azure-local/concepts/system-requirements-23h2#azure-requirements).
+
 ## Next steps
 
 - [What's new in AKS on Azure Local](aks-overview.md)