Gads I hate to keep bringing up HomeAssistant because I don't really use it all that much but if you have a spare server (Rpi/VM/old computer) you could maybe use this integration:
And then use the Hubitat community "Home Assistant Device Bridge"
OR do something like this (older post, read a few posts):
You'd use Home Assistant as a HomeKit controller (no Apple stuff required) and control your Ecobee from there then bring it into HE via the HE bridge (listed above).
