The devices are not compatible with Hubitat (see https://docs.hubitat.com/index.php?title=List_of_Compatible_Devices for a list known to work out of box, but many more can work with stock or custom drivers), and it's not just because there is no driver--they rely on odd behavior (group broadcasting only, at least for motion events) and it would require changes on the hub side. Here is some reading (yes, it's 2 years old, but there have been no significant Zigbee modfiications since then), and you can probably find more with additional searching:
For zigbee, Philips Hue (best but exxy - but also available in outdoor form), xiaomi/aqara (using 3rd party drivers you can find here on the forum), sonoff, cygnett. Probably others but these do work with HE (I have all of them!)
Curious if the HUE Motions have gone through a Version increment of significance whereby you don't want any prior to Version x.x ; kinda like the Iris ones caused a whole lot less problems after Version x.x ?
I use the 3rd party one that markus wrote for use with sonoff sensors (oh la labs), I'd guess that any sonoff compatible driver would work. . Also I don't have any other cygnett stuff - I bought this one on a whim when it was cheap at Harvey Norman.