API fixes summarization

Author: jboback

articles/cognitive-services/language-service/summarization/overview.md

@@ -13,7 +13,7 @@ ms.author: jboback
 ms.custom: language-service-summarization, ignite-fall-2021, event-tier1-build-2022, ignite-2022
 ---
 
-# What is document and conversation summarization (preview)?
+# What is document and conversation summarization?
 
 [!INCLUDE [availability](includes/regional-availability.md)]
 

articles/cognitive-services/language-service/summarization/region-support.md

@@ -0,0 +1,31 @@
+---
+title: Summarization region support
+titleSuffix: Azure Cognitive Services
+description: Learn about which regions are supported by document summarization.
+services: cognitive-services
+author: jboback
+manager: nitinme
+ms.service: cognitive-services
+ms.subservice: language-service
+ms.topic: conceptual
+ms.custom: references_regions
+ms.date: 06/11/2023
+ms.author: jboback
+---
+
+# Regional availability
+
+Some summarization features are only available in limited regions. More regions will be added to this list as they become available.
+
+## Regional availability table
+
+|Region|Document abstractive summarization|Conversation issue and resolution summarization|Conversation narrative summarization with chapters|Custom summarization|
+|------------|------------------|------------------|------------------|------------------|-|
+|North Europe|✅|✅|✅|❌|
+|East US|✅|✅|✅|✅|
+|UK South|✅|✅|✅|❌|
+|Southeast Asia|✅|✅|✅|❌|
+
+## Next steps
+
+* [Summarization overview](overview.md)