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Don’t doubt that many who have fewer kids tell interviewers it’s due to financial or housing considerations but the real cause is that kids take a lot of time & effort & that is not how most people want to spend their 20s & 30s anymore. They want kids in their 40s it’s too late.
The fact that many of the most highly skilled immigrants have some of the lowest fertility rates is worth discussing as well. In the US, Canada, the UK and Australian skilled Indian, Chinese,Vietnamese & Filipino immigrants have low TFR(often lower than in their home countries).

As Jean Twenge pointed out in her recent book “Generations”, “There is a full-blown mental health crisis among young people, and it was building long before the pandemic.”. The # of teens and young adults with clinical-level depression more than doubled between 2011 and 2021:
From there the first boom really started to take off. Between 1956-1966 Armenia saw 60K+ births annually & TFR was 4.0 or higher from 1958-1963. The second boom was even more impressive. The country saw 70K+ births from 1980-1992 & hit an all time high of 81,192 births in 1986.
So why has Brazilian fertility fallen below replacement? Several figures likely contribute. Brazil has long been one of the most urbanized countries in the world & is currently ~80% urban. In addition, Brazilian society has become more socially liberal towards relationships. 
The youngest members of the Greatest Generation (1910-1927) & almost the whole of the Silent Generation (1928-1945) married young (~half of women married as teenagers!) & had lots of kids. This was in part due to a demographic phenomena known as the spillover effect.
In 1900 just three European countries (the UK, Italy & Germany) recorded more births than the entire 27 country EU saw in 2021. Sub-replacement TFR across much of EU since the 1970s has done its work. Europeans have woken up to this crisis decades too late.
Thus it is almost impossible to accurately capture TFR for 2022 & will be harder still for 2023. True Ukrainian TFR (when adjusting for an accurate population that was far less than the 41M in 2021 used to calculate TFR) in 2021 was likely closer to 1.4 and not the ~1.2 reported.

By 2030s Poland will likely see a natural decline of at least 150,000 annually. There will also be more Poles leaving the workforce than entering (before immigration) as aging continues rapidly. Poland was already amongst the fastest aging Eastern Euro countries from 2012-2022.
Saudi Arabia & the UAE are rushing to Westernize & crush their TFR as quickly as possible. Here is the plan: 1.) Loosen alcohol laws so more Muslims can drink. 2.) Liberalize social laws on premarital sex & cohabitation. 3.) Raise taxes & lower subsidies for citizens.
A potential demographic collapse in the most populous state in the US will have severe economic & social consequences. The state will struggle to pay pensions and other liabilities in coming decades & their entire growth model is at risk as immigration slows.