They didn’t mention the last two years as possibly contributing to less childbirth. There could be counteracting effects there, stuck together with nothing to do, vs nobody to meet and nothing to do - but it at least deserves a mention. This 2019-2021 drop could bounce right back up if people chose to delay childbirth.
Before Covid, we had a middle school reunion. Every single one of us had 1-2 kids.
I have 8 best friends (Married for 15+ years). Only one of my friend and I have 2 kids. Everyone else has only 1 kid.
Pretty much all states except a couple are below replacement rate of 2.1. And some are way below 2.1.