Can you quote the text that supports your claim from the linked 'source'?

What I did find there was:

  This report’s estimates and projections of foreign-born residents in the U.S. comprise both legal and unauthorized immigrants. However, the numbers for each status group are not broken out separately except where stated.

As an aside; useful data:

Number of births in the United States from 1990 to 2022 https://www.statista.com/statistics/195908/number-of-births-...

( ~ 4 million per annum, now fallen to 3.5 million per annum )

Births were to foreign-born mothers (2000 - 2022)

  In 2000, 21 percent of births were to foreign-born mothers, according to data from the Annie E. Casey Foundation. This number has fluctuated slightly throughout the years, peaking at 25 percent in 2006. It decreased to 21 percent in 2021 before increasing to 24 percent in 2023.

  It's important to note that this data does not differentiate between illegal and legal foreign-born mothers and includes mothers from Puerto Rico and the Virgin Islands.

- https://www.newsweek.com/birthright-citizenship-donald-trump...