[stu2010]

Israel has a large and growing ultra-Orthodox population, with an average of 7.1 children per woman among the ultra-Orthodox Jews: https://en.idi.org.il/articles/25385

The US has a similar fertility-focused religious movement, but it's much more fringe and relatively smaller. Religious beliefs can drive super-high birth rates in pretty much any society, but aside from Israel, higher education has been associated with lower rates of religious belief. Declining religious participation and intensity of belief may well be contributing to the fall in global birth-rates.