It depends on what you mean by consciousness, if we are talking about the intelligence or self awareness or thoughts then I don’t see any problem with it being emergent. But if we are talking about conscious experience/qualia (not something that thinks or interacts, but something that just experiences) then I think it’s incoherent for it to be emergent. That there is a consciousness that is experiencing something is the only thing we can know as 100% true, and the world itself is something we can never know is 100% true: we could be a brain in a vat, we could be dreaming, in the matrix, a demon making us hallucinate everything etc. It seems a bit silly to say the 100% true thing is an illusion or is dependent because something that we don’t know is true tells us it is.