Send message from change status

functions.php

<?php
/**
 * Send message from change status
 */
add_action('woocommerce_order_status_changed',function ( $order_id, $old_status, $new_status, $order){
    global $Telsender;

    if ($new_status == 'processing'){
        $text = sprintf('%s - order_status_changed',$new_status);
        $Telsender->telegram->SendMesage($text);
    }

}, 10, 4);