是的，有可能，你只需要在代码执行的时候改变钩子，目前它是在cart中执行的，但是你想等待订单创建。

add_action( 'woocommerce_checkout_order_created', 'custom_email_on_applied_coupon_in_order' );
function custom_email_on_applied_coupon_in_order( $order ){
    $send_mail = false;
    // get all applied codes
    $coupon_codes = $order->get_coupon_codes();
    foreach( $coupon_codes as $code )
    {
        if( $code == 'bob' ) $send_mail = true;
    }
    // also check if there is a billing email, when an order is manually created in backend, it might not be filled and the mail will fail
    if( $send_mail && $order->get_billing_email() != '' )
    {
        $to = $order->get_billing_email(); // Recipient
        $subject = sprintf( __('Coupon "%s" has been applied'), $coupon_code );
        $content = sprintf( __('Hello %1$s %2$s, The coupon code "%3$s" has been applied'), $order->get_billing_first_name(), $order->get_billing_last_name(), $coupon_code );
        // you'll find more order details in the $order object, look here how to get it:  https://www.businessbloomer.com/woocommerce-easily-get-order-info-total-items-etc-from-order-object/  
        wp_mail( $to, $subject, $content );
    }
}