woocommerce-send-email-for-status.php

<?php

$order = wc_get_order(34152);
$mailer = WC()->mailer();
$mails = $mailer->get_emails();
if ( ! empty( $mails ) ) {
    foreach ( $mails as $mail ) {
        if ( $mail->id == 'failed_order' ) {
            $mail->trigger( $order->id );
        }
    }
}