Smart thermostat (TRV) with optional freeze protection

Hello together,
currently I have Saswell SEA802-Zigbee like thermostates (brand Hama) at home. This thermostats have an included and not optional freeze protection. It means when the battery voltags is falling under 2,2V, the valve is opening to 30%, indepentend of what temperature is set.

This protections has it’s right to exists, but personally I don’t want this kind of behaviour. Are they any smart thermostats (preferred Zigbee) without this protection or at least optional?

Alternatively I would also love a combination between classic thermostats and smart ones. The classic ones have an build in freeze protection (and generally stopping behaviour) indepentend of electricity. Would be cool to have a thermostat like this where you can set the level (0-5) smart.

Best regards