Hook woocommerce_checkout_order_processed not firing and change status in custom plugin

private function define_public_hooks() {

  $this->loader->add_action( 'woocommerce_checkout_order_processed', $plugin_public,'my_change_order_status_place_order' , 999, 4);
}



public function my_change_order_status_place_order($order_id, $posted_data, $order){

        global $wpdb;
        $check = true;
        $table_name = $wpdb->prefix . 'my_cart_custom_table';
        if (is_a($order, 'WC_Order_Refund')) {
            $check = false;
        }

        if ($check) {
            $billing_phone  = $order->get_billing_phone();
            $customernumber = preg_replace('/[^0-9]/', '', $billing_phone);
            $country_code = $order->get_billing_country();
        $check_abandoned_entry_sql = $wpdb->prepare("SELECT id, my_customer_id FROM $table_name WHERE my_customer_mobile_no LIKE '$customernumber' AND my_status IN (0,1)");


            $matching_results = $wpdb->get_results($check_abandoned_entry_sql);
    
            if (is_array($matching_results) && COUNT($matching_results) > 0) {
                foreach ($matching_results as $result) {
                    $customer_id = $result->my_customer_id;
                    $wpdb->update($table_name, array("my_status" => 2), array('my_customer_id' => $customer_id));
                }
            }
        }
    
    }