I've got the same problem with google home and that's why I bought an Amazon Alexa device instead of the google nest hub I wanted to buy
I finally found a working solution.
Ditch Tado.. and go with anything else.
I got so fed up with Google and tado doing nothing about a clearly simple situation.. I binned off the Tado and went with Google Nest. Don't bother with Tado any more.. useless.