Compatibility is highly limited. Only a small subset of the PS3 library can be successfully converted and played without severe graphical glitches, game-breaking bugs, or outright crashes.
no native method to convert PlayStation 3 (PS3) games into PlayStation 4 (PS4) PKG files convert ps3 games to ps4 pkg best
Before exploring the homebrew scene, it's important to know the legitimate methods Sony provides for accessing its older library. Compatibility is highly limited