This Seeking Tech article the PS4 version of Resident Evil: Code Veronica running on the PS5 with the “Enhance Image Quality for PS4 Games” setting.
You can find the comparison video below:
The PS4 version of Resident Evil: Code Veronica is actually an emulated release of the PS2 game. Based on tests, the “Enhance Image Quality for PS4 Games” setting doesn’t seem to help much with the clarity.