[Plugin: WooCommerce] Add Customer Note to every order

I am looking to add a line of text to every single order that is placed, regardless of whether the customer leaves one or not. I’ve managed to determine that the “Customer Notes” section under the Shipping Address information uses post_excerpt to handle the customer notes but I can’t seem to figure out how to add to that. So far, all I’ve been trying is adding to the functions.php of my theme but the closest I’ve gotten is my use of “add_order_note()” to add the text to the order notes. I thought this would work but the order notes do not export into the shipping application that we use and I need to place the text in a field that will export, which is why I chose Customer Notes. Any ideas?