It sounds like you have Hue motion sensors paired with your Hue bridge. Although that will allow your Hue lights to be controlled using the motion sensors, Hubitat is unable to access the sensor status as the Hue integration does not have that provision.
The Hue motion sensors are standard Zigbee 3.0 devices. Thus, you can remove them from the Hue bridge and pair them directly with the Hubitat hub. You might need to do a factory reset, Once paired directly with Hubitat, the sensor status will be available within the Hubitat system. You can create rules to use the sensors to control Hue lights, but you can also use them to control non-Hue devices, trigger alerts, etc. This is a much more flexible option.
I have a number of Hue motion sensors in my system paired directly with Hubitat. None of them control Hue lights, but they are effective at controlling other lights and also alerting me to motion events in various situations.