Maybe they want to do it, but had everyone busy with other more prioritary stuff: FromSoft with Elden Ring and Armored Core, Bluepoint with Demon's Souls and God of War Ragnarok, Nixxes with the ports of the Spider-Man games to PC, etc.
Maybe when someone gets free they may work on it.
I have to search his exact quote, but I think Jaffe says something like "I don't know if it's coming to PC or PS5 but Sony is definetively doing something with Bloodborne". As I understood, he know that they are doing something but doesn't know if it's a PC port, a PS5 or even a movie/tv show.