These groups are almost certainly very far outside the moral circles of virtually the entire global population, with some of the latter ones likely not even having any significant level of societal awareness.

Even within the Effective Altruism movement, which has much of its identity intertwined with the idea of moral circle expansion, research on and advocacy for improving the welfare of these potentially vast groups is considered very fringe and unusual.

However, this raises the interesting question, even if people don't care at all about these groups in comparison to mainstream issues, if they are forced to choose which specific one out of this selection they care about the most, which do people intuitively gravitate towards?