Also, did you restart the phone for good measure after completing ALL steps even if it wasn't working at the end of it?
Did you try going through the steps a few more times to make sure nothing was missed?
Again, I can only confirm it worked for me on my STOCK Pixel 2 XL on Oreo 8.1, and my ROOTED Nexus 5x on Nougat 7.1.2.
Also tried and have it working on my Essential PH-1 on 7.1.1 rooted and stock. Also on Oreo 8.0 Beta 2 rooted and stock using the exact steps mentioned.