Does the IKEA TIMMERFLOTTE work with HomeKit, Alexa, and Google Home?
The TIMMERFLOTTE speaks Matter over Thread.
For app control you need a Thread border router and a Matter controller, such as the DIRIGERA hub. It is a battery-powered temperature and humidity sensor with a built-in display. It suits HomeKit, Google Home, Alexa, SmartThings and Home Assistant users, with native support through Matter over Thread.
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.