Barnard College RD Class of 2022!

I got in! 3.9 GPA, 1430 SAT, great extracurricular, essays, and recs. I was wondering if any of you know what Barnard’s financial aid is like? I have not gotten my package yet because of an error with CSS, but if I do not get enough aid do they let students appeal? And do any of you know anything about the financial aid appeal process?