Edit: Fixed! Somehow I had LG Deep Color whatever setting turned off on all 3 HDMI inputs. Turned it on for the Ps4, and it's back to HDR. To be honest, not sure I can tell a difference, but I'm glad that it's back on.
Somehow broke my Ps4's HDR? Was working fine, and then I noticed every time I loaded up Spider-man, I wasn't getting the bubble in the top right that said HDR. Game still looked great, etc etc, so I didn't think much of it. Just today I loaded up God of War for the first time, and right off the bat it says HDR not supported.
I've got my LG OLED in Game Mode, and the Ps4 is set to automatic for HDR. Literally nothing has changed, but it won't go over into HDR anymore and no idea how to fix it.