We support multichannel selling through our partner magnalister. Through magnalister, your orders from marketplaces such as Amazon and eBay are imported directly into Shopware, which means they immediately end up in Pickware as well. Of course, you also have the option of using a different service to sync your marketplace orders. What's important here is that the orders from the marketplaces are created as orders in Shopware.
You can find more information on this topic in this article.