What is the ruling on the money a father receives from his work in mixed universities that do not adhere to Sharia guidelines, and does that affect the ruling on eating, drinking, and educational necessities derived from it?

Mixing between the sexes in education is forbidden and leads to corruption. It is not permissible to work in mixed-gender schools to protect one's religion and honor. The father must fear Allah and abandon this work. As for the daughter, there is no harm upon her in accepting the money and benefiting from it, for it is permissible.