Is there a way to add a new line above header csv

Summary:

I am trying to use a write file action in an integration that I have developed, and I feel like I have hit a limitation.

Content (required):

The recipient of the data needs the CSV in the following format:

When creating the CSV I am able to get the header row on the file, but I am unable to add the top line. (highlighted)

Is there any way to add this line in the mapper or in the endpoint configuration wizard? I am unable to find any information on this anywhere.

Version (include the version you are using, if applicable):