Consider adding a map view of the freighter network for easier navigation on the supply chain. It could use the minimap but with an overlay of the freighter network (i.e. similar to factorio train network map).
Some potential details and interactions:

• Freighter hubs are shown distinctively on the map.
• Freighter drones are shown on the map.
• When hovering over a freighter the path of the freighter is highlighted, as well as it's cargo (and maybe the current input/output of the hubs along the route, but that might be too much info)
• When hovering over a hub, the current input/output of the hub is visible, as well as the freighters and their path is highlighted, where the freighter has a stop at the hub.