Prolewiki is the Lemmy aligned wiki, run and maintained by Lemmy/grad users and staff. Greenland is not considered global north because they are a colony of Denmark. Geopolitically their interests don't align, and for the sake of economic classification, Greenland is exploited and Denmark is doing the exploitation. The map uploader didn't decide who is or isn't in the global north, they're repeating the classification used by the United Nations Conference on Trade and Development https://unctadstat.unctad.org/EN/Classifications.html.

The USA is not a democracy. Not a weak or flawed democracy, as those require some democratic input. There is no democratic consideration done by the ruling elite when dictating their rule. https://www.cambridge.org/core/journals/perspectives-on-politics/article/testing-theories-of-american-politics-elites-interest-groups-and-average-citizens/62327F513959D0A304D4893B382B992B The extent of the democratic process in the USA is voting blue or red. It's a meaningless and infrequent vote.