delete-all-failed-orders-wp-cron.php

<?php
// Delete all failed orders custom action
add_action( 'musilda_delete_failed_orders', 'musilda_delete_all_failed_orders' );

// This function will run once the 'musilda_delete_failed_orders' is called
function musilda_delete_all_failed_orders() {
 
  $args = array(
    'status' => 'failed',
  );
  $orders = wc_get_orders( $args );
  foreach( $orders as $order ){
    $order_id = $order->get_id();
    wp_delete_post( $order_id, true );
  }
  
}

// Make sure this event hasn't been scheduled
if( !wp_next_scheduled( 'musilda_delete_failed_orders' ) ) {
	// Schedule the event
	wp_schedule_event( time(), 'daily', 'musilda_delete_failed_orders' );
}