Answer
Yes, an official cryptocurrency exchange called Cryptalom is mentioned in Uruguay; it operates under the supervision of the Central Bank of Uruguay. This shows that cryptocurrency exchange can exist in a regulated format, not only through private arrangements.
For someone relocating, this is important because of bank compliance requirements. Selling through a recognizable platform is usually easier to explain than P2P transfers from unfamiliar individuals because the transaction trail and the exchange counterparty are clearer.
At the same time, the presence of a platform does not remove the obligation to confirm the origin of funds. Keep records of cryptocurrency purchases, wallet transactions, sales, and the receipt of funds so that the bank can see not only the final payment but the entire path of the capital.