How do you know that? Have you looked at statistics for housing stock in the US in general? You can find it here: https://www.nmhc.org/research-insight/quick-facts-figures/qu...

And if you're curious about new construction, you can find it here https://www.census.gov/construction/chars/highlights.html

You'll find that in 2022 over half of new apartment units had 1 bedroom or less. I guess you live in a very different state that is not reflective of overall trends across the US.