@makaveli7 I have installed LYWSD03MMC units inside two fridges at home, and read them using an ESP32. I have not tested the maximum range, but the ESP32 is appx. 4-5 meters away and one floor above one of the fridges.
For my freezers I currently use RF433 thermometers with external sensors. I have yet to find a BLE thermometer rated for sub-zero temperatures. You will definitely need something with an external sensor - button-cell batteries will not work very well/long at -20C.