When using the drag/drop feature of the Nested Pages plugin to reorder pages, a redirect isn’t created. Changing the order updates the parent page and slug values. If we change the slug or parent page using the edit page/post option, the redirect is created successfully. We’ve opened a ticket with the Nested Pages dev as well in case it’s something on their end that needs to be updated.

https://wordpress.org/plugins/wp-nested-pages/