If there is anyone who thinks that the world is flat, what are the edges of the world? Someone hiding the edges of the world from us? If the world were flat, there would be no atmosphere.
Antarctica is a ring that forms a literal wall of ice that surround the continents and beyond Antarctica is is a dome wall. There's an Antarctica treaty enforced by all the worlds militaries working in cooperation to prevent any unauthorized access.
Also on a ball Earth the atmosphere would be sucked off by the vacuum of outer space, what a joke. In reality there's a dome covering the entire plane and outer space is nothing but a hoax.
I respect your thoughts, but your imagination is so high, you think it's a different world beyond the antartica. You say this hidden world is hidden from us. Please be a little realistic.