Dashboard for (original) iPad Air?

The Homeykit app has more device support than Athom/Homey’s Homekit support so you could try that.
Also Google home works great if you make virtual devices (+ a few flows) for the not supported devices.

And i tried the Homeydash on an (original)
Ipad air aswell, it runs just great on it but i don’t need it so aint gonna use it.