How to automatically fulfill POS orders (virtual products / services)? Flow App workflows?

Context: selling virtual products / services on my Online store and through my POS system. I’m searching for a way to automatically fulfill the POS orders if they are paid.

Looking at the Flow App conditions, to check on a paid order I can only check the “source identifier” to identify POS orders. So if this is not empty.

After that I could submit a fulfillment request as an action but it seems I don’t have the necessary data anymore to fulfill from.

How can I fulfill the POS orders automatically?

Not exactly sure how to do it in flow - I have a feeling it should be possible. But if you’re open to a 3rd party app, we have an automation app called mesa and I could build this workflow out for you.