Neanderthals aren't legally human and organoids do not have awareness in the manner you are attempting to establish. Interestingly, a network of organiods, connected via neuromorphic arbiters, could provide some interesting intepretations of awareness, especially when the organoids cross species lines.

From a national security perspective, the West has to get over its crippling squeamishness on all things genomics or else the Chinese will completely dominate the neuromorphic space.

From a moral perspective, if you are concerned about stopping slavery, I recommend tackling actual instances of it, such as the open air slave markets in Libya or addressing the valid concerns of any one of the hundreds of millions of rural Chinese.

From an ethical standpoint, there are a couple federally funded institutions that traffic stem cells who could use some spotlight in them.

I'm unsure if a religious institution mired in worldwide pedophilia accusations is the right party you want to associate with to stop this. I recommend stepping off the soapbox for a moment and try explaining, precisely, how many neurons are required for the sentience you are describing. Is it 1? 10? 1,345?

Quantifying sentience is your burden. Blanket policies of "all neurons are sacred" are prematurely alarmist.