The value of research will be in the experience and what she learns. She will learn not only whatever she is working on, but also how to operate/behave/co-exist in a lab setting with adults.
As others have said there may be benefit in getting future internships and the like. Do not do this thinking it will necessarily help her in admissions. I don’t know the proportion of applicants who have research experience in high school, but it’s not uncommon. At the more selective schools, research is not necessarily anything that will set an applicant apart on its own. IME the only research that is notable and can be relatively important in the admission decisions are students who have won competitions like ISEF, Regeneron (probably a few hundred students) and/or who made a meaningful enough contribution to result in a publication (rare).
There are hundreds of ‘good’ colleges. Encourage your D to look for schools that will be a good fit, across the factors that matter to her. A low admission rate is a sign of popularity, not necessarily fit.