@erje
The Unity sensor comes pre-installed with firmware to work with Home Assistant.
Home Assistant does have an integration to expose entities in Apple HomeKit. You can check it out here: https://www.home-assistant.io/integrations/homekit/
I have not tested this integration but after reading through the documentation it does look like the following Unity entities will be compatible with HomeKit:
RGB LED
Humidity sensor
Temperature sensor
Ambient light sensor
Has human target binary sensor
Has moving human binary sensor
Has still human binary sensor
The entities that may not be possible to expose on HomeKit are the numeric values such as the human distances and energies, sensitivity thresholds, offsets, distance range, etc…
There hasn’t been much interest in a Zigbee version of the Unity board yet. If it picks up then I may look in to it.
I would recommend the Tuya ZY-M100 (Zigbee), I believe it’s currently discounted on AliExpress because of their anniversary sale.
Beats the Aqara fp1 in some scenarios, I have the wall mounted version and lt works perfectly fine. A lot of positioning and tinkering went into it though, I had false positives because of a PC fan