The Jewish Futures Project has shown that children of Birthright Israel participants are more likely to be raised as Jews, have had a Jewish circumcision or a baby-naming ceremony, and be enrolled in formal and informal Jewish education compared to the children of nonparticipants.
https://www.jns.org/new-study-details-impact-of-birthright-israel-trips-on-children-of-participants/
https://www.brandeis.edu/cmjs/birthright/jewish-futures/jewish-futures-2024.html