Standard Letters using Zapier and Google Docs

Hi, Just trying for the first time to have a form submission in knack trigger a new google doc using zapier. My problem is the fields available to google doc are not all the fields I want to pull through. They seem to only be the fields in the form. I really want to pull in all those fields that would be in a table. So I guess this means child fields. Is there a way to do this please?

Thank you