But as always, I am but one random internet dork who doesn't have the same information they have, so that is how you should see my take.
https://www.billkingblog.com/blog/the-u-n-has-quietly-lowere...
https://www.aei.org/commentary/peak-american/
https://ourworldindata.org/data-insights/fertility-rates-acr...
https://usafacts.org/articles/what-will-americas-population-...
https://www.cbo.gov/publication/61879
(fertility rates are converging globally at ~1-1.6 TFR, with some countries as low as 0.6-0.8)