I would not expect the financial aid package to change when Lehigh gets the FAFSA data. They already have all the information included in the FAFSA, along with even more information, from the CSS Profile.
One of the schools my S24 got into EA is in NYS (RPI), and they have a form schools publish that shows cost breakdowns and financial aid details. Even though the FAFSA data has not gone out to schools, the form from RPI shows what our FAFSA number is expected to be based on the data we put into the CSS profile.
(I posted about it here.)