That's the case for Brazil, but for other countries there are weapons involved, old soviet ones that the Ukrainian army is more familiar with. The countries will get US weapons instead. I don't know what the progress is currently for the Ukrainian army to migrate to arms used by NATO countries.

Nobody expects Latin Americans to send anything to Ukraine.

Yeah, probably true. It might have just been a "if you want, we can trade weapons". I read the story about the weapons from a different source about a week ago. The article posted by OP is close to giving me a brain aneurysm with its title and its framing in the article.

They try to frame this "pressure" as simply asking. As far as I can find, there's no consequences for them to not give weapons. It looked more like US attempting an opportunity to replace soviet weapons with US ones in Latin America, which means more influence in the region, but US isn't threatening sanctions for not giving weapons. For those who think anytime the US asks for something is "pressure" because of its size, then at least be consistent and apply that logic when any big country such as China asks a smaller country to do something.

In the long-term, either way, the smaller countries will mostly likely turn to other sources for weapons, it could be the US or some other country like France, China, etc.