https://np-logistic.com.ua/ here is the Nova Poshta logistics website, where you can find all the information you need. As far as I know the company works like this:
1. You bring consignments of your goods to their warehouse, they are stored in NPL warehouses
2. You create a TTN through NPL and they independently dispatch your previously brought goods from their warehouse.
This is if directly "in a nutshell".
The difference from the usual NP is that these are generally different divisions of Nova Poshta, they have completely different functionality.