Coding required to pull a custom field into an order export

Hi

We are using woocommerce and use an order export plugin to export orders.

We require the 'add message field' exported using our order export plugin
https://m.flowersbyflourish.com/product/your-fresh-flower-delivery-50-off-with-code-first4/

This can be done using some custom PHP.
I've had a developer do this before on our other website, so it's quite straight forward job.

See image atached.

If this can be done today or Monday.