
Most likely not since it will be made in Unreal Engine 5, though since everyone at CDProjektRed is working on Witcher 4, Unreal Engine 6 might be out and what the games made with. There were many reasons why CP2077 was broken as it was at launch, but one of the main reasons was due to using their own game engine and a ton of effort trying to support last Gen consoles.

They showed off Squadron 42 earlier this year. They’re definitely spending money on stuff since it had a ton of A-List actors in the game. Graphics look amazing, everything looks so detailed… The game engine however was struggling. During the gameplay footage it constantly looked like the frame rate dropped to 15fps. They claim the game is “Feature Complete” (whatever that means in their definition…) and now is in the polishing stage. I honestly don’t think their CryEngine based Engine will run well even on the latest and best hardware when (if) it finally releases unless they make massive changes to the engine…
I wouldn’t be surprised if UE6 is out by the time Witcher 4 launches.