Why doesn't the product quantity change when placing an order programmatically?

Question

WordPress

Hello
I create an order programmatically with the following code

function create_order_programmaticaly() {
  $address = array(
    'first_name' => 'Test',
        'last_name'  => 'Test',
        'company'    => 'Test',
        'email'      => '[email protected]',
        'phone'      => '00-00-0000',
        'address_1'  => '0 test st',
        'address_2'  => '',
        'city'       => 'Test',
        'state'      => 'NY',
        'postcode'   => '10010',
        'country'    => 'US'
    );
   
   
  $order = wc_create_order();
  $order->add_product( get_product('527'), 1); 
  $order->set_address( $address, 'billing' );
   
  $order->calculate_totals();
  $order->update_status("Completed", 'Created order programmatically', TRUE);  
}

Everything is created correctly, only the write-off of balances does not occur.
Can you please tell me which function writes off the balances or does it have to be done manually? Maybe there is an example somewhere?

Answer 1

Perhaps there is not enough at the end
There are a lot of examples