Wait for someone smarter to come in here but a quick search based on your wiring you have a line voltage thermostat so you would need a line voltage Smart Thermostat which are not nearly as common but available.
https://thesmartcave.com/best-line-v...rt-thermostat/
Differentiating – Line Volt vs Low Volt Now let’s see how to differentiate a line volt and low voltage 2 wire thermostat. You’d be thinking it is a confusing task to differentiate, as both are having only two wires. Well, the key difference here is the ‘thickness’ of wires coming out of the thermostat. The low voltage (24 volts) model will be having ‘thin wires’ or ‘small wires’ coming out of its back, whereas the line voltage (120/240 volts) model will be having ‘thick wires’ or ‘bigger wires’ coming out of its back.
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https://thermostatguide.com/2-wire-thermostat/ | Best Digital Thermostat Reviews and Buying Guide