See my power measurements. I doubt the usefulness of a sleep-mode consuming a guessed 10 W. Now it goes into what I call standby mode. Some products call it deep-standby and standby.
I have read something about this:
For chinese market 10 W power consummation is a standby/sleep-mode/ Stand-by ,so Q10 pro not need a deep-standby ... "theoretically"
For USA/EU market stand-by/sleep-mode or low power consummation is less .
For Old Q10/Q5 there is a NO official hack to enable Stand-by, maybe can enable also for q10 pro, but it's not good way.