Duplicating a product programmatically does not set the attributes in the copy?

Magento 2.4.6

I am trying to duplicate a product using the MagentoCatalogModelProductCopier class which is also used in MagentoCatalogControllerAdminhtmlProductDuplicate in the execute function..

When I click the button in admin to duplicate a product, it works, all attributes are being set in the copy. Doing the same in my code does duplicate the product, but not all attributes are set.

My Code:

$original = $objectManager->create('MagentoCatalogModelProduct')->load(1234567);
$copy = $objectManager->create('MagentoCatalogModelProductCopier')->copy($original);

This creates a copy of the product, but most of the attributes are not set like in the original. Do I have to do something more?

Thanks!