How to enable "Additional Information" window in Visual Studio 2022 during creating a new project from a custom template

Question

I create a VSIX package which contains a project template. The VSIX package compiles and installs as a Visual Studio 2022 extension without any issues. Also, it appears as one of the templates when the new project is created:

The main problem is that the .Net version (not .Net Framework) can't be changed during the creating process as the "Additional Information" window can't be invoked. The "Create" button appears instead of the "Next" button:

The template project has the TargetFramework net6.0. My goal is to create the template which should allow choosing TargetFramework during the creating process. For example:

I used this article for development process with no success: https://learn.microsoft.com/en-us/visualstudio/extensibility/getting-started-with-the-vsix-project-template?view=vs-2022

What was missing?