An Smartthings compatible thermostat will allow Alexa to natively tell you its temperature. It doesn’t have to be connected to HVAC. I suggest a Wifi Tstat but seems like any should work. (OOPS MAY NOT WORK for providing current temp, but refer to actual thorough testing by this guy:
My own testing seemed to indicate it was only telling me the setpoint, while I was breathing on it to make a noticeable difference from setpoint. But I got bored and fell asleep.
FYI depending on which Wifi Tstat, may provide the manufacturer phone or web app that will show actual temperature.
you offer to install it, maybe he would roll over. You move, then leave it behind and get something better. The convenience of voice adjustment is good.