And it communicates OK to outside the fridge? I would have thought a fridge is pretty close to a Faraday cage
It does, though in my case I've purposefully put an IKEA smart plug (which acts as a Thread/Matter router) in the kitchen, too, so the signal only needs to reach 2-3 meters out.
Yeah I thought this might be an issue but it's been running flawless for months without ever dropping out.
I did the same and just added zigbee repeater outside the fridge.
Works great.
The door seal is plastic/rubber and is RF transparent.
For me, the Zigbee ones (generic ones from AliExpress) have been great inside both fridge and freezer. Bluetooth ones occasionally dropped off (and were much worse re: battery life.)