In reality, rich countries are still buying all the grain they can to feed their livestock and carry on as before, just a bit more expensive, while the poorer populations experience the real shortages.
I'm totally aware that vegans consistently invade this kind of thread on HN to promulgate their vegan propaganda, like little prophets of malnutrition sent into the world by a god of famine, but this time, what was the lie? I can't see it.
As far as I can tell it's true that meat production and consumption is very unevenly distributed: the USA and Argentina produce almost double as much beeef as anybody else:
https://ourworldindata.org/meat-production#beef-and-buffalo-...
https://www.mekkographics.com/meat-consumption-by-country-an...