Enable the packaging page and map operators to a Packaging station
Publish the work order and map each operator to a tracking station of type Packaging so the page is active.
The page itself is disabled unless the work order is published AND the user is mapped to a tracking station of type Packaging.
An unmapped operator sees an empty state, so map them to a Packaging station in Settings > Tracking Stations.
Packaging station access is granted independently of shipment access: a user can be mapped to a Packaging station without being mapped to any Shipment station, and vice versa.