“wpcfe_shipment_after_tracking_number_data” an action hook is use to add additional column in the shipment table data. Note: You must have custom table header added already for the custom data. Please check this hook “wpcfe_shipment_before_tracking_number_header”

Copy and paste the following to for customized the label in the theme functions.php file

add_action( 'wpcfe_shipment_after_tracking_number_data', function( $shiment_id ){
	// Note: Use the $shipment_id variable to get shipment data
	?>
    <th class="no-space">Custom Value <?php echo $shiment_id; ?></th>
    <?php
}, 25 );