the glass on a S8 plus can be replaced and there are kits to do it as well as you tube videos that show how. The job is extremely difficult and (strangely) easier if the glass is quite broken. But if there are vertical lines already on the screen the entire display assembly needs to be replaced. I tried replacing the glass on a s8 plus but damaged the extremely fragile and sensitive ribbon at the bottom of the display... creating the same vertical lines , so .yes possible but very difficult
