So that the stock levels of each individual store can be managed separately from the online shop, you should create a corresponding warehouse with its own stock for each store. To do this, go to Articles → Warehouse → Warehouse Management in the Shopware backend and select Create new warehouse. You can find more information on creating warehouses in this article.
For each store and its associated warehouse, you can use the corresponding checkbox in the Create warehouse window, or later in Edit warehouse, to specify whether the stock of this store should be available in the online shop or not.

