Policies are set by the individual school. The best people here can tell you is what they’ve seen schools do - they can’t tell you the answer in your exact situation. You need to contact the financial aid office.
It is not uncommon for schools to deduct any outside scholarships from what they are awarding you, in which case there would be no overage. However, some schools - and some scholarships - are structured in a way that allows you to use the overage for other expenses or to even get a refund.
Call your school.