Individual parents aren’t generally in a position to open a daycare and make a meaningful difference in the supply of childcare. Employers may be able to do so.
BLS data[0] indicate over 30% of married couples with children have a stay-at-home parent, and census data[1] indicate over 20% of childcare is provided by a non-parent relative. So family providing care is quite normal and close to the majority of the supply of childcare.
[0] https://www.bls.gov/news.release/famee.t04.htm
[1] https://www.census.gov/library/stories/2023/11/child-care.ht...