If someone is interested here are the APIs to witch Home/Away mode and Open Window.
It will work if you are not using the “auto-assist” (subscription) from Tado. In order to activate away mode you need to have geofencing active and away from home. For open window to work first an open window must be detected by Tado.

PUT – https://my.tado.com/api/v2/homes//presence
“homePresence”: “AWAY”

Open Window:
POST – https://my.tado.com/api/v2/homes//zones//state/openWindow/activate