You can connect multiple stores to your Pio app. Products with the same SKU in more than one store, will use the same inventory in Pio. When an order is placed the inventory will be allocated and not available for sale for any of the connected stores.
Connect another store to Pio
Follow the steps in this guide if you want to connect a new Shopify store to your Pio How to integrate with Shopify
When your store is connected, inventory will be synced from Pio to Shopify.