Complex things have features that are not in the details that make them up, or so-called emergences (like the moisture of the water, which does not exist in individual molecules but exists in the whole).
But in these cases, the transition from the individual to the whole is clear and scientifically understandable to us. Consciousness, on the other hand, is so fundamentally different from matter that there is no explanation for how it supposedly “grows” out of it.
The materialist claim that matter is capable of producing consciousness expresses only a blind belief and provides no explanation or justification for its claims.