1. To add header title, copy following code. Change your_function_name to the function name of your choice and “Date Created” to your desired column name.

   add_action('wpcfe_shipment_table_header', 'wpcfe_shipment_table_header_callback');
   function wpcfe_shipment_table_header_callback(){
   	echo "<th>Date Created</th>";
   }
   

2. To add column data, copy following code. Change your_function_name to the function name of your choice.

   add_action("wpcfe_shipment_table_data", "wpcfe_shipment_table_data_callback");
   function wpcfe_shipment_table_data_callback( $shipment_id ){
   	$data = "<td>";
   	$data .= get_the_date( "Y-m-d", $shipment_id );
   	$data .= "</td>";
   	echo $data;
   }
   

3. To add multiple columns, copy following codes.

   add_action("wpcfe_shipment_table_header", "wpcfe_shipment_table_header_callback");
   function wpcfe_shipment_table_header_callback(){
       echo "<th>Date Created</th>";
       echo "<th>Pickup by</th>";
       echo "<th>Custom Meta</th>";
   }
    
   add_action("wpcfe_shipment_table_data", "wpcfe_shipment_table_data_callback");
   function wpcfe_shipment_table_data_callback( $shipment_id ){
       $data = "<td>";
       $data .= get_the_date( $shipment_id, 'Y-m-d' );
       $data .= "</td>";
        
       //Another data  
       $data = "<td>";
       $data .= get_user_meta( get_current_user_id(), 'first_name', true );
       $data .= "</td>";
   	
   	
       //Custom data  
       $data = "<td>";
       $data .= get_post_meta( $shipment_id, 'custom_meta', true );
       $data .= "</td>";
       echo $data;
   }
   

Need additional code example? click this documentation How to add Employee, Client and other WPCargo user role in shipment table