TL;DRMouseover the "toggle personal roboport" button shows where your construction bots are using arrows if they are off-screen.
What ?I often run past something that needs to be built and construction bots leave my personal roboport to build it. Then when I am halfway around the map I notice I am missing construction bots and have no idea where they are. The I just sit there waiting half an hour for them to catch up.
When you mouseover the alerts for building ghosted stuff Factorio shows arrows pointing to where the missing items are on the map.
So why not: when you mouseover the toggle personal roboport icon it shows where your construction bots are using those same arrows.