We allow our customers to order items from two locations in the one order. However, when we process the orders (using a third party delivery app) it only automatically fulfils the items from one location, leaving the order marked as unfulfilled on Shopify. Is it possible to get the second location to automatically fulfil as well? We don’t split fulfilments so all of the items are shipped in the one package anyway.
You can set up a Flow which will fire up on trigger “Order fulfilled” (this will trigger even if partially fulfilled by an App as it happens in your case),
The Flow will check if there are unfulfilled items in this order and fulfil them.
Can add delays or checks, but the general idea is like this.