Cannot see Requisition Lines in PROCESS REQUISITIONS screen

Summary

After the Requisition is in approved status, it is not available in Process Requisitions Screen to create a Purchase Order

Content

We planned to import Requisitions from Service Now to Oracle using Rest API. We are able to get them into oracle once they are in approved status in Service Now, we can see them on Requisitions screen but when I tried to find them on Process Requisitions Screen/Add to Document builder then I can't see them. So, I am wondering is there any setup we are missing or please let me know how we can make this work?