How to add a Zigbee-HA sensor to GA?

I have a Zigbee temperature sensor which is visible in HA. I would like to make it available to Google Assistant as well to ask things like hey google, what is the temperature in the living room.

GA responds that it (the sensor) is not configured, and indeed it is not visible in Google Home. Lights, for instance, are - and have the names from HA so the connexion is OK.

Is it possible to add “non-operational” entities from HA (sensors, as opposed to say switches on which you perform an action) do that they are queriable from Google Assistant,?