Does the Aqara Display Switch V1 EU work with HomeKit, Alexa, and Google Home?
The Aqara Display Switch V1 EU is Zigbee.
It reaches HomeKit, Alexa, Google Home, SmartThings, Home Assistant and Homey through Matter over bridge, which needs a compatible Aqara hub and a Matter controller. It suits Home Assistant users, with native support through Matter over Thread. HomeKit, Google Home, Alexa and SmartThings users reach it through an integration (a Matter bridge).
How the device gets into the platform on this route. The headline is the best route: local before cloud, direct before bridged, core before community. The methodology page lists every level.