I have an i9-12900K (same gen desktop chip) that is self-reporting ~15W idle. I would be pretty surprised if their mobile chip didn't scale lower than that.
https://twitter.com/tomwarren/status/1478514671980269574
It doesn’t show the new Intel processors going below about 30 watts.
Then again I kind of doubt the M1 Max chips can’t get below 20 W.