I am far from an expert on cognitive science, however I have given a considerable amount of thought around the topic of consciousness and AGI, and particularly about what the nature of consciousness even is. I would consider myself erudite and well-read on the topic, despite having no professional or academic credentials on the matter.
The best conclusion I have been able to come to thus far is that consciousness is not a manifestation of the physical structures of our mind, but rather a reflection or view into the nature of our soul. The physical structures of the mind are a prerequisite, but not sufficient, to manifest consciousness. To wit, there are several other mammals in the world which have similarly complex brain structures, and in many cases larger amounts of brain mass, but do not exhibit any sort of human-like consciousness.
I saw all this, while being generally agnostic/areligious. I've studied this question philosophically from the perspective of the theologians and from various religious works, of course, but given as I don't myself have a strong religious belief system, this is not the primary influence for why I take the above position. Simply put, I think a purely materialistic view of consciousness is clearly incorrect, however I don't have a better alternative that's provable.
Given my conclusions, I do not think it is possible for AGI to ever be truly conscious, but it may be possible for it to convincingly mimic consciousness.