I have had these inside for almost 4 years:
https://www.zigbee2mqtt.io/devices/WSDCGQ11LM.html#aqara-wsdcgq11lm
It can handle up to -20°C according to the specs, but regularly shows -21 or even lower.
Freezer is just set to -18°C.
Did I just have “the right model”? 
