Substrates of consciousness… I think they don’t have it here because they can’t come up with an answer a bunch of AI models will find. Certainly a Millenium problem for biology if there ever was one.
Substrates of consciousness? You mean the neural correlates of consciousness which we already have?
As a neuroscientist: no. Not what I mean.
Then please enlighten me. What else do you want except what neural activity is necessary and sufficient for a conscious experience?