WC Shipping Zone ID's https://wpsites.net/wordpress-tutorials/find-woocommerce-shipping-zone-id/

functions.php

add_action('loop_start', 'list_woocommerce_shipping_zones');
function list_woocommerce_shipping_zones() {

    if ( current_user_can( 'manage_woocommerce' ) ) {
    
        $zones = WC_Shipping_Zones::get_zones();

        foreach ($zones as $zone) {
            echo 'Shipping Zone Name: ' . $zone['zone_name'] . ' | ID: ' . $zone['id'] . '<br>';
        }

        // Also include the default zone
        $default_zone = new WC_Shipping_Zone(0);
        echo '<span style="position:relative;color:red;z-index: 9999;">Shipping Zone Name: ' . $default_zone->get_zone_name() . ' | ID: ' . $default_zone->get_id() . '<br></span>';
    }
}