like the brain is literally encased in the body so how can it be separate? like if you go around licking lamp posts you’re going to pick up some germ that’s gonna make you feel like crap and you get insomnia or fever and your brain will definitely be impacted. and so you’ll have short temper and that’ll get you into trouble.
You could replicate material but what animates it isn’t assured simply by replication of some material
There’s also theory that consciousness is radio wave that could find or caught by hosts. So maybe you just created a host.
Another theory is that everything is conscious to exist in the dimension of space time and well it can get deeper as to say none of this exists at all. Or is a simulation. We simply decide that replication =reality of the meaning we give it.