I'm sure you've already been updated in this, but I just wanted to update this forum topic for anyone who was following it.
You are able to update or add a new row in any sheet or spreadsheet through the recipe. Just make sure that it has one row for the column names and another full row of data so we can detect the column names in the recipe. Let us know if you're facing any issues!
Send us a ticket, we will try our best to assist you with your problem