For merchants running multiple stores on the Shift4Shop platform that share the same inventory, the Multiple Stores Inventory Sync plugin will allow to keep real-time inventory across all stores at any time.
One of the stores will work as the Master Store with the centralized inventory, and the additional stores will be child stores that subscribe to the inventory in the main store. Any changes applied to the stock of your products in the master store will propagate automatically to all child stores, and as orders are received on any of the child stores, a real-time update will notify the master store to deduct the corresponding inventory.
*Multiple Store Sync is free for any shop using Shift4 Payments as their credit card processor. If you're not using Shift4 Payments, learn how to enable it in your shop.