Sorry if someone posted this already didn't see anything. But Figured out a neat trick if you use apex launcher, probably works with other launcher too.
Go to behavior settings in apex settings. then go to double tap and then select launch shortcut. Go down to s pen: screen off.
That's it! Double tap home screen and the screen turns off.
Go to behavior settings in apex settings. then go to double tap and then select launch shortcut. Go down to s pen: screen off.
That's it! Double tap home screen and the screen turns off.
xda-developers