I have a Tapo temperature and humidity sensor T315, and I recently noticed that in Google Home, this sensor is visible (if you connect Tapo with Google Home, of course), but you can't trigger other devices based on a temperature measured by the T315.

I can turn on a light based on a certain humidity level, but not based on a specific temperature. In Google Home, I can read both the humidity and the temperature.

In Google Home, go to Automations.
Then click the plus sign.
Click on Household.
Click Add Starter.
Then click When a device does something.
Select the T315 (it will appear with the name you gave it in the Tapo app).
And you will see that you can only set a trigger based on a specific humidity level.

Is this a Google issue, or is it a Tapo firmware limitation that prevents Google from using the temperature sensor data as a trigger?

I know that I could use the temperature as a trigger in the Tapo app, but in the Google Home app, I can trigger devices that do not appear in the Tapo app (meaning they are not part of the Tapo family).

Luchtvochtigheid = Humidity