My guess is being South American will be a boost, but it won't be as large as if you ticked off Mexican or Puerto Rican. Don't overthink it. Mark the box that you fall under.
For firm hiring you should also tick off the diversity box.
I'm taking it in South Korea. I highly doubt they will cancel or adopt LSAT-flex for Korea though since the situation regarding COVID-19 has greatly improved here.
... ,Cubans, Uruguayians, Peruvians, etc. other South Americans are considered URM. I ... i'm central american, not south american/ there's is a ... huge majority of us in south florida but i guess ur ...