Google Home - ST Sensor

Hi Guys.

Been a ST user for some time but using it with Amazon Alexa. I have just reset to factory my ST this and all my smart home tech and have now moved over to Google home , still with ST. Now everything is working great and actually really liking the google home app. However i am looking for some advice.

I have multiple ST multipurpose sensors. These have been added to ST and can see the temperature and when the contact is open and closed. However in the Google home app the sensors are just showing a little grey square with a cog. When i click it i just get general information.

Are these supposed to work in Google home? I was hoping to create a virtual sensor that then announces when the contact has been opened.

Thanks in advanced