> We don't know what generates human consciousness. But we know the brain is a key part of it. At what point does a bunch of lab grown human neurons become conscious?

Why just human neurons for a human consciousness?

We know very little of what sparkle consciousness but the consensus seems to be that most living things experience it with varying degree. Even though most of us, conscious humans, are absolutely fine with millions of mammals being slaughtered without much care for their feelings.