See also
yaleglobal.yale.edu/content/replacement-fertility-declines-worldwide
"Since the start of the 21st century, close to 20 countries have declined in population size and are aging rapidly due to low fertility levels. If current below-replacement fertility rates remain unchanged, populations of 40 countries, including China, Germany, Japan, Russia and South Korea, are projected to be smaller by mid-century. Even if fertility rates were to increase modestly, as assumed by a United Nations projection, the populations of those countries are still expected to be smaller by 2050."
I'm not saying that overpopulation isn't an issue
"Despite more countries facing population decline and rapid population aging, world population continues to increase, likely reaching 8 billion by 2023, 9 billion by 2037 and 10 billion by 2055. This growth is largely due to the high rates of demographic growth in sub-Saharan African countries, where fertility levels are generally in excess of five births per woman. While the populations of 40 low-fertility countries are projected to be smaller by mid-century, some 25 high-fertility countries, nearly all in Africa, are expected to see their populations more than double by 2050.
For most countries, sustained below-replacement fertility rates promise population decline. Communities that refuse to adjust will only exacerbate the consequences of these powerful demographic trends."
But there's a context about fertility rates that's worth noting as the global data story is rather more complex than 'we just need to have fewer children'