For exporting additional metadata for the orders using Order Export Import Plugin for WooCommerce below code snippet can be used in the child theme’s functions.php
In this example, we are adding 3 extra fields shown below with export CSV as shown in the code snippet.
‘pdf_invoice_num’ => ‘_invoice_number_display’,
‘Payer PayPal address’ => ‘Payer PayPal address’,
‘PayPal Transaction Fee’ => ‘PayPal Transaction Fee’