I am not familiar with the mangosteen. I love learning about new plants I would like to grow.
This has such great health benefits from here:
https://en.wikipedia.org/wiki/Mangosteen
Various parts of the plant have a history of use in traditional medicine, mostly in Southeast Asia; it may have been used to treat skin infections, wounds, dysentery, urinary tract infections, and gastrointestinal complaints
https://www.gardeningknowhow.com/edible/fruits/mangosteen/mangosteen-fruit-trees.htm
There are many truly fascinating trees and plants that many of us have never heard of since they only thrive in certain latitudes.
So I would not be able to grow it. Though I enjoyed learning about this tree.