I know that this is an old topic but I just stumbled upon it and was a bit sad that it doesnt work. However I noticed that clicking “reload integration” in the integration screen forces a poll of the tado servers.
So I used this to check how to automatically reload an integration. I found this forum post which actually helped me out a lot. I created the rest_command and used the tado automation, works like a charm.
I now trigger this rest_command whenever I finish a Tado automation so that the new tado state is always reflected in home assistant after an automation reload. For your use-case of more updates you could use a time_pattern with minutes: /2 as trigger and poll with this every 2 minutes