what buttons do not work? Are you running it via USB?
Detroit Become Human should show PS icons if the gamepad is plugged in (not wireless) to a USB and Steam Input per that game is shut off ( source: PS4 controller :: Detroit: Become Human General Discussions )
Witcher 3 can have issues displaying PS icons. Yet again the controller has to be wired via USB for it to work right (and have steam input off yet again per game of course). If there is an issue still with it, a work around was posted a few years ago here on post #9 might help: PS4 Controller Button Prompts in Witcher 3 :: The Witcher 3: Wild Hunt General Discussions