[WooCommerce] Add the Shipping method to advanced notifications emails

add-ane-shipping-methods.php

// Place the following code in your theme's functions.php file to add the shipping method to ALL emails

add_action( 'woocommerce_email_after_order_table', 'wc_add_shipping_method_to_emails', 15, 2 );
function wc_add_shipping_method_to_emails( $order, $is_admin_email ) {
    echo '<p><strong>Shipping Method:</strong> ' . $order->get_shipping_method() . '</p>';
}
 
// Place the following code in your theme's functions.php file to add the shipping method to ADMIN emails only

add_action( 'woocommerce_email_after_order_table', 'wc_add_shipping_method_to_admin_emails', 15, 2 );
function wc_add_shipping_method_to_admin_emails( $order, $is_admin_email ) {
    if ( $is_admin_email ) {
        echo '<p><strong>Shipping Method:</strong> ' . $order->get_shipping_method() . '</p>';
    }
}