Hi Krid,
I’ve just tried it with the “Advanced Order Export For WooCommerce” plugin, and it looks like this plugin can export EANs from order items already. So here what I’ve done – in “Set up fields to export” I’ve opened the “Product order items” section, clicked “Add field” there, and entered _alg_ean
in the “or type meta key here” field. Then I clicked “Confirm” and dragged this new field to the list on the left, where it says “Drag rows to reorder exported fields”.
Please give it a try and let me know if that works for you. If there will be any issues – if possible, please share access to your site, so I could log in and check what’s going on (my email is [email protected]).