Regardless of the national entity, isn’t the presence of the European power the violation? Latin America was gaining its independence from Spain in the first half of the 19th century; I don’t see how that impacts the doctrine.
Britain was considered a silent partner in regards to the Monroe Doctrine. I doubt the US would have complained at all had Britain established a new colony in violation of the Monroe Doctrine. They certainly weren’t going to complain of a small group of islands 400 miles off the coast that had more or less been under British control for several hundred years.
The Monroe Doctrine was concerned with the establishment of new colonies after its passage.