SAP provides for the transaction ME9FF in the S/4 Cloud to print the scheduled POs.

The requirement would be the option to schedule this report as a background job, so as to run this periodically.

There is an Customer Influence ticket already open with SAP with this. (https://influence.sap.com/sap/ino/#/idea/221909) 

Request all to please vote on this for SAP to have this solution incorporated in future releases.