This is a typical take, but the the hard problem of consciousness has very strenuously denied neuroscientists for well over a century at this point. We know a lot more about the systems of the brain, but no more about the nature of consciousness itself.

It’s still an open debate, some people don’t believe the hard problem is unsolvable, but on every debate there are really smart people who defend absurd positions. The reason I think it is unsolvable is that consciousness is by definition unobservable, except by the subject.

We can know a lot about the brain, neurons and structures etc. But that doesn’t really get us closer to understanding how an aggregation of impulses and chemical signalling takes us from what is essentially inert matter to a brain.

If you’re interested, the book On Purpose by philosopher Michael Ruse has a chapter on it that is succinct and up to date with the latest neuroscience research. I am sure there are better books out there on the subject but I can only recommend what I’ve read.