create additional deployment slots
Azure Deployment Slots Explained: A Step-by-Step Guide - YouTube
If you are using Azure App Services, you must be familiar with the deployment slots. Now, Azure Functions also support the deployment slots feature (which is currently in preview).
Create applications - Configuration Manager | Microsoft Learn
Create applications with deployment types, detection methods, and requirements to install software.
Azure Functions deployment slots | Microsoft Learn
Learn to create and use deployment slots with Azure Functions by using the Azure portal or with Azure CLI.