700 million people in the world face food scarcity at any one time. The world is overpopulated and its resources strained by the existing 7.4 billion humans (CO2 budget, natural resources reserves, etc).
The reason that folks face food scarcity is a distribution problem, not a production problem. We don't do a good job at making sure people don't go hungry, even in the US.
https://www.theguardian.com/environment/2019/sep/06/phosphat...
https://www.nationalgeographic.com/science/article/sea-runni...
https://www.siwi.org/latest/the-worlds-natural-aquifers-at-r...
https://www.nationalgeographic.com/science/article/groundwat...
https://www.idtechex.com/en/research-article/the-meat-indust...
again, overpopulation is a myth. a convenient and lazy one. but still a myth.
there are too many resources on the web explaining this.
We may produce enough calories in sugar, but stuffing the world with cheap junk food is not a solution. Total amount isn't a good metrics; total quality and availability would probably be better.