Sony has detailed PS5 backwards compatibility, and things like games saves and transferring your PS4 games to your PS5, but they also detailed a number of PS4 games that won’t work on PS5.
It’s unclear why these games won’t work on PS5. It seems like an odd list made up of a few games that I’ve heard of and others that I haven’t, but none of them stand out as games that wouldn’t work on PS5.