I am noticing the same in “sleep mode” when I close my MacBook and it’s not plugged in.
I just wanted to make a thread here.
After googling I found this :
This post explores the issue WindowServer prevent from sleeping on macOS Ventura and earlier. In addition, something else could keep Mac from go to sleep. Reading to know how to fix Mac won't sleep
iboysoft.com
Window server is the culprit. I didn’t find a solution.
Somebody made a clean install, but I don’t want to do that, maybe if 13.2 releases next week it will get fixed.
I have a MacBook Pro m1 2020 that worked fine until Ventura.
When I have my MacBook in my backpack at school or work it is draining my battery.