No. We don't understand our own sentience. I don't know how we can be so confident as to not think it can evolve here using literal human neurons that can learn to take input signals and send output signals.
I don't think this 200,000 neuron array is sentient. But I also don't think we can define the line where that may happen. I assume this company will scale. How far, and to what extent?
We don't understand the soul, we don't understand gods-will, we don't understand Qi, we don't understand Orgone energy etc.
As such, how can we build moral incentives around any of these things?
We must understand something about them, and what you seem to 'know' is that sentience is a thing (that exist), and it arises from the human mind - I don't think this is anymore proven than any of the other red-herring counterexample concepts I gave.
Or to summarise/TLDR - Sentience? It doesn't exist, it's a desperate attempt to maintain the human-centric concept of the soul, stripped of religious tones to appear more legitimate. If you disagree, prove otherwise.