Microsoft announced an update for the .NET Upgrade Assistant with a new CLI tool on June 1, 2023​.

• The new version of the Upgrade Assistant CLI tool allows you to port your applications from either Visual Studio or your command line. This tool helps you upgrade your application to the latest .NET and migrate from older platforms such as Xamarin Forms and UWP to newer offerings. The same functionality is available from both the Visual Studio and command line experiences​²​.
• To install this global .NET tool, use the command dotnet tool install -g upgrade-assistant. To upgrade this tool to the latest available version, call dotnet tool update -g upgrade-assistant​²​.
• There is also a Visual Studio extension for the Upgrade Assistant. Once installed, you can upgrade your projects by right-clicking on the project in the Solution Explorer window, and selecting Upgrade​²​.