As the title says, would be handy to have access to the temperature sensors in Homekit to create automations e.g. when temperature reaches X do Y
tado's HomeKit implementation is pretty basic if you ask me.
If you want this behaviour today, Homebridge and the plugin at https://github.com/lukasroegner/homebridge-tado-smart-thermostat will bring you all of this, with the added benefit of being able to return tado back to "Automatic Control" instead of being stuck forever in Manual Control. It also exposes the humidity sensor data if you want that.