Min Max Planning and Requisition Import
I can create a workround by scheduling the Requisition Import to run at regular intervals using a dummy user with unlimited approval authority to create the schedule and setting the Initiate Approval after ReqImport parameter to Yes so that the workflow approves the requisition after it has been imported or by customising the requisition approval workflow so that if the source is Inventory the status is set to Approved but these are not very elegant solutions.