(Navimow i2 AWD) Why does the rear wheel of the Navimow i2 AWD make a relatively obvious mechanical rotation sound when turning?

The rear wheel of the Navimow i2 AWD is a steerable, powered wheel that combines a steering motor and a drive motor within the wheel assembly. The noticeable mechanical rotation sound when turning mainly comes from the steering motor. Unlike the non-powered universal wheels used in other two-wheel drive Navimow models, this design naturally produces slightly more noise, which is normal and not a cause for concern.