Hydronic heating with slab sensor

I have a Tekmar 518 thermostat that I would like to replace with the Wyze thermostat. The thermostat controls the hydronic in-floor heating via a slab sensor (as compared to a room temperature sensor). Is the Wyze thermostat compatible with external sensors such as the slab sensor?

Unfortunately it is not compatible with external temperature sensors.

The slab sensor seems like a very handy thing to have. You’d think you can reprogram a pin to have it work as an external sensor.