Something curious about our American society and its insistence that a particular Court precedent, "separation of church and state," enshrined by the people and many in its government, as if statutory law [i.e., law as legislated by Congress]. But no, "separation" is merely Court precedent. Typically, though not by constitutional decree, but merely common sense, any precedent set by the Supreme Court ought to ultimately be codified by Congress, as happened following by some years, the effects of a severe heart attack suffered by President Eisenhower, who, as a result of his coronary, briefly passed the Captain's Chair of the presidency to Richard Nixon for a time. What followed that incident, several years later, somewhat precipitated also by Kennedy's assassnation, was passage and ratification if the 25th Amendment, codifying the succession of the presidency in the event of the president's removal from office, either temporary or permanent.
But to the subject at hand, shortly following WWII, in 1947, was the SCOTUS case, Everson v Board of Education, which was decided 5-4, setting the precedent of "separation of church and state," but that precdedent has never been codified by further congressional action, and stands today as mere precedent, which, though many believe it, is not the same thing as if it was codified. All it takes to change it is a separate, contrary decision by a later Court proceeding, such as happened by 2022's Dobbs. v Jackson Women's Health dismissing 1973's Roe v Wade. One of the most important citations from the Everson case is this commentary in the syllabus: “…that although the United States government cannot promote religion, it also cannot be religion’s adversary.” https://supreme.findlaw.com/supreme-court-insights/the-separation-of-church-and-state--everson-v--board-of-education.html
Yet, in its present context, government has become religion's adversary. Witness the assault by government over abortion, trying to impose abortion or trans surgery on Catholic hospitals and care centers. "separation" in these instrances is hardly religion beating down the doors of government, but the reverse.