“Birthright citizenship” has never been enshrined in law.
It was taken from an opinion of a Supreme Court judge in the 1980s.
There are lots of people who are born in the US who are not citizens - the children of ambassadors for example.
How do you explain the 14th Amendment?
Section 1: All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside. No State shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States; nor shall any State deprive any person of life, liberty, or property, without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws.
The children of ambassadors born in the US are pretty much the universe. How many can you name?
Children of foreign invaders would also qualify. How many of those can you name? (It's wise to kill foreign invaders before they can reproduce.)
Ambassadors don't have to pay their parking tickets. They are not "subject to the jurisdiction". The rest are, and their offspring born here are therefore citizens. Until the Constitution is changed.