Evolution did not anticipate social media and hyper addictive algorithms.

People have been having children later since about the 1930s. The change has been gradual, so it's only really hitting hard now because they've not had any children during the years when it's relatively easy, and now some can't. That could still be due to technology but not social media exclusively.

Coincidently though, this aligns pretty much perfectly to people's stability also shifting to happen later in life. Specifically the economic stability to raise a family on a single income. That's not really possible any more, so it shouldn't be a surprise that people don't do it.

Just to add a little factual data to this point, the fertility rate in England and Wales has been below two children per woman since the 1970s.