Meta key for tracking number

Thanks for reply, i know, i’m not tryining to use it for export, i’m using another plugin for to export orders (Advanced Order Export For WooCommerce). I’m trying to get the order tracking number with this plugin ( the plugin allow to add custom field with custom meta key) when i add the meta key: “_wp_shipment_tracking_items” the custom field display all the tracking informations like that: a:1:{i:0;a:4:{s:17:”tracking_provider”;s:8:”logiphar”;s:15:”tracking_number”;s:6:”861337″;s:12:”date_shipped”;s:10:”1572912000″;s:11:”tracking_id”;s:32:”9153e06c6c7c5685b45f7370a205f140″;}}.
My goal is to display just the tracking number, i’m asking which meta key instead of “_wp_shipment_tracking_items” should i use to get only the tracking number? thanks

Hi, thank you for reply, the shipping company we are working with, deliver and keep the money for around one month, then they start sending us the goods, we send them each monday the list of unpaid orders with their tracking number, so they could release the money. That is why we need to export completed orders with the total price and the tracking number.