Azure DevOps Demo Generator helps teams create projects on their Team Services account with pre-populated sample content that includes source code, work items, iterations, service endpoints, build and release definitions based on a chosen template
@utkarsh2020 thank you for reaching us. There are some limitations on the extractor/template builder tool. Exporting and importing board columns, styles, and rules are not supported. Please find the limitation document here.
I had created a template using extractor tool but that did not exported my Board with my columns