Does the Shelly 2L Gen3 work with HomeKit, Alexa, and Google Home?
The Shelly 2L Gen3 needs no neutral wire.
It is a two-channel in-wall relay that gets Matter over Wi-Fi after a firmware update. It suits Google Home, Alexa and SmartThings users through an integration (the maker's cloud). Home Assistant users reach it through an integration (local Wi-Fi control).
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.