Split fulfillment requests based on item stock level

Thanks Paul for the response. Could you provide me an example of what it would look like for the initial flow when a new order is placed. For example, a 2-item order gets placed for 1 quantity each. Only 1 of the products is in stock. I want it to immediately send the fulfillment request for that 1 item. Order Created would be my trigger, send fulfillment request my final action, but I am unsure of the in between conditions and actions I need to take to make sure only the instock item comes over as its own fulfillment order. Thanks!