Adding filter by shipping method

Hi, I need to a filter by shipping method on my Woocomerce Order Page. I have this code that I also saw from a forum 7 years back.

function display_shipping_dropdown(){

    if (is_admin() && !empty($_GET['post_type']) && $_GET['post_type'] == 'shop_order'){

        $exp_types = array();

        $zones = WC_Shipping_Zones::get_zones();
        foreach($zones as $z) {
            foreach($z['shipping_methods'] as $method) {
                $exp_types[] = $method->title;
            }
        }

        ?>
        <select name="shipping_method">
            <option value=""><?php _e('Filter by shipping method', 'woocommerce'); ?></option>
            <?php
            $current_v = isset($_GET['shipping_method']) ? $_GET['shipping_method'] : '';
            foreach ($exp_types as $label) {
                printf
                (
                    '<option value="%s"%s>%s</option>',
                    $label,
                    $label == $current_v? ' selected="selected"':'',
                    $label
                );
            }
            ?>
        </select>
        <?php
    }
}
add_action( 'restrict_manage_posts', 'display_shipping_dropdown' );

Filter is showing up on my Woocommerce page but it’s not functioning. How to make it work?Please help.