This is a tricky topic to navigate because from a materialist perspective consciousness is the side effect of biochemical mechanisms. And many will point to the brain as the obvious container of our consciousness as a bullet to the head versus the arm would demonstrate.
But if a brain/intelligence is all you need to prove consciousness, then would an effectively complex set of neural networks that contained the same amount of neurons as a human be considered "conscious"? My guess is even at that level, probably not. Algorithms alone may mimic consciousness, but it won't be true consciousness.
Imagien this: what if consciousness is closer to something like the movie Avatar? What if the body our consciousness inhabits is closer to that of inhabiting a machine or computer that coexisted with the physics of the universe our body exists?
This would mean Jake from Avatar could theoretically inhabit not just a Na'Vi body, but what if they reproduced the Pandora equivalent of a squirrel for Jake to insert his consciousness into? Jake the Squirrel would be only as capable of expressing itself as the constraints of the body would allow it to.
Many religions discovered a long time ago that this is the most likely model of what we understand to be consciousness/sentience.
I'm not saying you're wrong, this is a conversation larger than what we may believe and touches into the core of what makes us humans that machine alone cannot replicate.
Do you have any reason to introduce that whole extra invisible, unprovable complex system? Is there anything the materialist model can not explain that you feel your model does, or is it just a case of "I don't like the alternative"?