I have some Zigbee Thermostatic Radiator Valves (TRV) from “Moes”. Sonoff do not make TRV so it was not possible to get any from their ecosystem. I can add them to Home Assistant using the USB Zigbee dongle but it would be nice to add them to the iHost.
I am also thinking of getting a Zigbee Carbon Monoxide meter. I think this is also a type of device not sold by Sonoff. I believe there is a compatible Smoke Alarm but not Carbon Monoxide.
There are probably also other device types for Zigbee devices that also do not have a Sonoff equivalent.