It might be nice to have an internet connection to monitor the freezer. Check temps, keep a temperature log so you can tell if it ever thawed out due to a temporary power outage or something.

But I see absolutely no reason why a freezer’s control circuitry needs to be connected to the internet. There’s no reason you’d ever need to turn it on or off remotely … or even really change the temperature remotely. Any time you need to turn it on or off or change the temperature, it’s because you’re taking food in or out of it … which has to be done manually, with physical access to the machine, so you might as well adjust the temperature manually while doing that.