Help detecting vacuum back in dock

Third party integrations
1

Hello

I have this robot vacuum and want to know the best way to detect whether it’s back at its docking station. I don’t think I can connect to it via HA (or any other means) so looking to implement a sensor.

Any suggestions?

https://www.costco.com.au/Appliances/Vacuums-Floorcare/Robot-Vacuums/Narwal-FREO-Self-Cleaning-Robot-Vacuum-And-Mop-Cleaner/p/153888