I think who you qualify as "POC" (a loathesome term, in my opinion) depends on what your motivation for doing the exercise is. If the point is to get the perspectives of authors who are not products of Western world white privilege, then Southeast Asians and Indians (whether native or diaspora) ought to count. If the point is to get the perspectives of authors who grew up in the Western World suffering the results of institutionalized white-privileged racism, then I wouldn't even include native African (except South African) or South American authors.