This is the description of the cargo by default, that is, the type of goods that is delivered there can be written.
If you want to display a list of goods in additional information, https://1b.app/ru/forum/logistics-and-delivery-services/14082-nova-poshta-opisan...
already answered here
you can simply display a field in the list of orders or a block in the order card + you can set the order status to change depending on the status of the package, but this is another matter, form a separate request.
You can take it from the order card, repeat what I wrote in paragraph 2