"Does this make Machado legitimate?
Or Er, Gonzalez?"

Gonzalez is legitimately the democratically elected president of Venezuela, per the 2024 election.

"I really am curious about what the leaders of other South and Central American nations will have to say about all of this."

Most of them are likely in favor of it. You clearly have no idea how much of problem the displacement of 25% of Venezuela's population by the Chavez/Maduro regime has caused to the entire region.

And before anyone brings up Iraq again, unlike that country Venezuela's actually had a long history of stable democracy prior to those thugs subverting it (with Moscow and Beijing's support).

Looks like the talking points from Moscow finally came through.

Venezuela already has a democratically elected president, Edmundo Gonzalez.

This isn't really anything new. The USPS has been consolidating their processing centers for years now. Some letters don't even get postmarked at all.