Does ApprovalMax support a review and editing functionality for QuickBooks Online Purchase Orders?

Does ApprovalMax support a review and editing functionality for QuickBooks Online Purchase Orders?

Unfortunately, no. 
Purchase Orders can be modified exclusively by the person who created them (the Requester), and only up to the point of full approval. 

If any changes are applied during the approval workflow, the respective Purchase Order will start going through the approval workflow anew, with previous approvals reset.