Automating accounts payable including creating purchase orders linked to Monday events

We are an events based business and currently track all of our events on Monday. Our finance team is looking to automate our accounts payable function, and has considered various apps to do this. This would include creating purchase orders associated with an event. Is it possible for us to create the POs in Monday as part of the workflow, or do these need to be created outside Monday? And similarly, how easy would it be to then integrate Xero into this process?