Hi Krish,
It’s not possible to export a specific page’s design from a template with one go.
You would need to export all Elements, and copy the CSS and Customizer settings that affect that page.
With that said, the Marketer theme relies solely on custom CSS and the customizer.
It would be best to temporarily Import Marketer on a staging site, and then copy or export the Customizer settings, and then copy the CSS in Additional CSS as well.