I am sure this has been reported before (maybe by me) but I can not find it now.

It is not possible to batch copy any articles. This is because of the workflow. The content item is copied in the _content table but the item is not created in the _workflow_associations table. As a result the article is not available.

I know there was talk over the summer of workflows being rewritten but there has been no sign of this and if Joomla 4 is ever going to make it to a beta release etc then this and other workflow bugs need to be addressed