The ocean’s all over the world, IOW, when the sealevel rose, lots of places got flooded. Plato knew about the Atlantic. He apparently didn’t know anything about Indonesia.
Sundaland (Indonesia) flora and fauna fit the Platonic description, just the place is wrong. Some 10 million square miles vanished virtually over night around 10600 BC and the start of the Younger Dryas mini ice age which lasted about 1000 years when the world’s climate once again warmed which date coincides with the sinking of Atlantis in 9600 BC.