WP List Table: Column.php sortable custom field

WP List Table: Column.php sortable custom field.php

<?php 

// For iBid Auctions theme: https://themeforest.net/item/ibid-multi-vendor-auctions-woocommerce-theme/24923136

// WP List Table: Column
add_action('manage_product_posts_custom_column',  'ibid_show_columns');
function ibid_show_columns($name) {
    global $post;
    switch ($name) {
        case 'shipping_country':
            $shipping_country = get_post_meta($post->ID, '_shipping_country', true);
            if (isset($shipping_country) && !empty($shipping_country)) {
                echo $shipping_country;
            }
            
        break;
    }
}

// Displaying the values
add_filter('manage_edit-product_columns', 'ibid_columns');
function ibid_columns($columns) {
    $columns['shipping_country'] = 'Shipping Country';
    return $columns;
}

// Sortable
add_filter( 'manage_edit-product_sortable_columns', 'ibid_sortable_date_column' );
function ibid_sortable_date_column( $columns ) {
    $columns['shipping_country'] = 'Shipping Country';
    return $columns;
}