It’s always nice to see a free and easy fix.
Workflow 2.0 ‘Not Submitted’ and ‘Pending Approval’ navigation lists not working correctly in Microsoft Dynamics GP after upgrading – Microsoft Dynamics GP Community
Install, Upgrade & AdminMicrosoft & the GP Ecosystem
Archived post from 2017. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.