If you wan to get some info from ORDER entity there is a method to do that. We can do that by loading by some property or by loading order per ID
$orders= \Drupal::entityTypeManager()->getStorage('commerce_order')->loadByProperties(['order_id' => '233136']);
$order= reset($orders);
or just
$order= \Drupal::entityTypeManager()->getStorage('commerce_order')->load('233136');
and then call some method on this entity and check/do what you need.