How do I get the product item author id from the order object?

I have a website, where users can add their products. After a user purchases a product and pays for it, I want to create some custom logic. I need to know the authors of the individual items purchased. After following this guide I have the below EventSubscriber code

public function orderCompleteHandler(WorkflowTransitionEvent $event) {
  $order = $event->getEntity();
  $items = $order->getItems();

  foreach($items as $item){
    error_log($item->getTotalPrice()->getNumber());
    // Here I want to get the item's author 
  }
}

(Please disregard the error_log function as it is only for developing purposes)

It works as expected and lists the prices (one-by-one) of the items purchased. Now I want to list the authors of the items as well. Unfortunately there is no built in method to get the authors. I was thinking to go in the direction of getting the order item as an entity and then getting the entity author that way. Any suggestions how to do this? or any other suggested approaches?

As per the discussion above with @Jaypan Commerce order doesn't implement the EntityOwnerInterface so I made a pretty ugly workaround, that I'm posting, so it might help others, but please only use this if you know what you are doing.

public function orderCompleteHandler(WorkflowTransitionEvent $event) {
$order = $event->getEntity();
$items = $order->getItems();

foreach ($items as $item) {
  $item_id = $item->getPurchasedEntityId();
  $database = \Drupal::database();
  $query = $database->query("SELECT * FROM commerce_product_field_data WHERE product_id = :product_id", [
    ':product_id' => $item_id,
  ]);
  $result = $query->fetchAssoc();
  $author_id = $result['uid'];
}