Hello! We know some of the technical details on how Nanoleaf implements scenes: HomeKit Accessory Protocol (HAP) over CoAP/UDP (was: Nanoleaf Essentials bulb via Thread/CoAP) - #68 by lambdafunction There just hasn’t been someone to wire that up. We may be able to fake lightbulb fade using Nanoleaf’s scenes - it isn’t something that HomeKit supports natively, sadly.
Let me know if you have any other questions!