it will likely need an lcd assembly replacement. you can always try this yourself and source the parts, however it’s not something I’d necessarily recommend for a first repair attempt since it’s very easy to break the face id cable on the screen on these ones. if you go this route I’m sure there’s a guide on ifixit for it and I’d definitely follow it closely.
otherwise you’ll want to try to find a reputable repair shop that can repair it for you and get a price quote