Is there any way to access the in-game console in The Witcher 3 on PS4 to type custom commands? If yes, how can I access it?
According to this source, the console is not natively available even on the PC version of the game. A separate mod, hosted on the Nexus website, is needed to access the in-game console. And, since the console version of Witcher 3 does not support mods, the in-game console cannot be accessed.