[Add Custom Admin Column To Order Table] #woocommerce

functions.php

//Add content
function action_woocommerce_admin_order_item_values( $product, $item, $item_id ) {
    //  WC_Order_Refund OR WC_Order_item
    if ( $item->get_type() == 'shop_order_refund' ) {
        $item = new WC_Order_Refund( $item_id );
    } else {
        $item = new WC_Order_Item_Product( $item_id );

        // Only for "line_item" items type, to avoid errors
        if ( ! $item->is_type( 'line_item' ) ) return;
    }
	if($product){
		echo '<td class="line_packing_weight">('.round($product->get_weight()).'g) - '.round(($item['quantity'] * $product->get_weight())).'g</td>';
	}
    // Replace this part with your own code
    
 
}
add_action( 'woocommerce_admin_order_item_values', 'action_woocommerce_admin_order_item_values', 10, 3 );