Temperature not recognised by Google Home

I have just bought an MHCOZY eWeLink 16A Smart Switch with Temperature Monitoring. It is set up and working from the app.

I have connected it to my Google Home and it is visible in the Google Home app as a switch. I can turn it on and off.

However, Google Home doesn’t know that it is a temperature sensor as well as a switch. How can I get Google Home to respond to questions like “what is the temperature”?