docs(apim): Provide updated list of supported Arc regions

Author: tomkerkhove

articles/api-management/includes/preview/preview-callout-self-hosted-gateway-azure-arc.md

@@ -7,4 +7,22 @@ ms.date: 05/25/2021
 ---
 
 > [!IMPORTANT]
-> API Management self-hosted gateway on Azure Arc is currently in preview. During preview, the API Management gateway extension is available in the following regions: West Europe, East US.
+> API Management self-hosted gateway on Azure Arc is currently in preview. During preview, the API Management gateway extension is available in the following regions:
+> 
+> - Asia (East, Southeast)
+> - Australia (Central, Central 2, East & Southeast)
+> - Brazil (South & Southeast)
+> - Canada (Central, East)
+> - Europe (North, West)
+> - France (Central & South)
+> - Germany (North & West Central)
+> - India (Central, South, West, Jio central & Jio West)
+> - Japan (East & West)
+> - Korea (Central & South)
+> - Norway (East & West)
+> - South Africa (North & West)
+> - Sweden (Central)
+> - Switzerland (North & West)
+> - United Arab Emirates (UAE - Central & North)
+> - United Kingdom (UK -South)
+> - United States (US - Central, Central EUAP, East, East 2, East 2 EUAP, North Central, South Central, West Central, West, West 2, West 3)