That's a good point. If we don't figure out how to design for what we call consciousness it might be that what emerges from some future neural network is an alien mind that's very different from what humans would call conscious. Could that be called AGI?
That's still very distant from what people are calling AI today.
The fact that something is alien doesn't mean that's not conscious, humans aren't the pinnacle of biological development/evolution.
I think the real issue is that when most people refer to consciousness, they have their own subjective experience in mind which strongly resists any tidy definition. I think it’s extraordinarily unlikely LLMs have anything like this, but they are far more able to effectively respond to their surroundings than most animals and in some areas better than humans.
So if you’re waiting for proof that an LLM has an inner life basically equivalent to your own, you’ll be waiting a long time. After all, other humans can’t even prove the fact of their own consciousness to you! They could just be replaying their training data at you in a way that is merely a convincing but false simulation of the true consciousness which you experience inside your head.