ok I remember using it just a few months ago, did AMD do away with it or something? I use TVs a lot for my computer and HDMI scaling is very important for that and I know I'm far from the only one. Just saying this ahead of time, with currently muddy and rough waters for the gaming community and developer relations, removal of features is a VERY bad idea guys. Every guide that directs to HDMI scaling seems to be old, I don't even have a "Display" sub tab in settings. Most of the guides were posted on the AMD website by devs, so I know it was a significant enough feature to put time into clarifying. All my games overscale on a TV and HDMI scaling was an actual nugget of gold.
And yes, all my drivers are up to date and i have uninstalled and reinstalled Adrenaline.