Yes, ApprovalMax supports GRN functionality for QuickBooks Online Purchase Orders.
This feature is a part of Advanced and Premium plan for QuickBooks Online connected Organisations.
You can use the setting Goods Received Note (GRN) in the Purchase Order workflow to track the GR status in the Purchase Order.
This is how it works
First, the Organisation Administrator enables the GRN setting the Purchase Order workflow via the Gear icon:
Purchase Order Requesters, Approvers and Organisation Administrators can track the statuses Not Received, Partially Received and Fully Received, and also set/change the delivery status for approved Purchase Orders.
To do so, click on the UPDATE STATUS button and select one of the options in the drop-down list (optionally, attachments and comments can be added):
Please note: The Goods Received status will only be available when the Purchase Order has been fully approved. The people stated above can change the status without any restrictions.
All changes are reflected in the Purchase Order's audit trail, which details who changed what and when as well as any comments and attachments: