I am following tutorial for Create an Item Template for dotnet new CLI
After running dotnet new stringext I get the message
The template "Example templates: string extensions" was created successfully.
I look up for the extension in my test folder but I do not see anything new created.

Found a similar question with an answer for macOS - Where is the dotnet CLI's default template directory on mac?
On Windows it is also in a
.templateenginedirectory inside your user directory -%HOME%\.templateengine