CHECKOUT: show qty of each position

add_filter('woocommerce_cart_item_name', 'tzn_custom_woocommerce_cart_item_name_checkout', 999, 999);
function tzn_custom_woocommerce_cart_item_name_checkout($get_name, $cart_item, $cart_item_key)
{
    if (is_checkout() &&  !is_wc_endpoint_url('order-received')) {
        $cart_item_quantity = $cart_item['quantity'];
        $get_name = $cart_item_quantity."x ".$get_name;
    }
    return $get_name;
}