Can I extend the Shopware Pickware premium plugins?

I need to extend/hook the functionality of shopware’s premium plugin pickware wms
Shopware WMS powered by Pickware | Warenwirtschaft | Integration | Erweiterungen | Shopware Community Store

Is there a way I can do it without modifying the plugin’s actual code?

Thanks.

https://developers.shopware.com/developers-guide/plugin-extension-by-plugin/