Using python 3.9, users are able to advantages of new features in Python 3.9 . To learn more about the , please visit What’s New In Python 3.9 — Python 3.9.7 documentation
In addition, we updated the default settings for Azure Function Python apps concurrency settings. Follow this guide to learn how to configure your apps to achieve better throughput performance.
Learn more: Improve throughput performance of Python apps in Azure Functions | Microsoft Docs