The official Japanese account for the game said on X, according to machine translation, that the release date in Japan “has not yet been decided,” without going into detail about the reason. It certainly seems like a reason could be the patent infringement lawsuit Nintendo and The Pokémon Company filed against Palworld developer Pocketpair last week,

Surprise! Palworld, one of the biggest games of the year, has suddenly arrived on PS5. But its debut on the console comes just days after Nintendo and The Pokémon Company filed a patent infringement suit against developer Pocketpair.

Palworld arriving today on PS5 was just announced at PlayStation's September State of Play, so you can stop asking for a that port.