I can’t recall how the setting is called but when I was not watching something for some minutes, the TV turned off automatically. Pushing a button on the remote woke up the TV afterwards.
Since the last version this doesn’t work anymore. Why? I really appreciated it.
I am not aware of this function being availvable natively. Turn off does wake my tv.
It might depend on the cec implementation of your device(s), but its hard to tell without logs.