integrate with woocommerce barcodes

I need to add this output into the CSV:
<?php
echo WC_Order_Barcodes()->display_barcode($order_id);
?>

I have tried to follow the guide but cannot get anywhere.
I want on the CSV the customers details plus the barcode generated by that line.

Im using woocommerce barcode generator as well.

Thanks

https://ww.wp.xz.cn/plugins/woocommerce-simply-order-export/