In theory, it should not be hard for a college that requires both parents to offer a net price calculator that asks if parents are divorced or separated and (if yes), ask appropriate questions about each parent’s finances.
In practice, there is a small number of net price calculator templates that colleges may use (the College Board one being a very common one). How well each allows better divorced parent questions and estimates, and whether each college actually puts such formulae into its net price calculator, may not be known to the students and parents.