A first attempt...
At first blush, it might make sense to try and simply write the list variable directly to the spreadsheet, using an approach something like this:
However, using this approach, your entire list will be written to a single cell of the spreadsheet.
Instead, use a Loop!
Place your Excel or Google Sheets module inside a loop. Instead of adding the List variable directly to your spreadsheet, add the List Item variable created by the loop module.
Now, each item in your list will be written to a different cell in a single column!