Replacement effects (such as that of Underrealm Lich or the first ability of Jace, Wielder of Mysteries) can't be used to replace draws that Narset disallows. However, if an opponent's first draw is replaced (by Underrealm Lich's ability, for example), that draw didn't happen and Narset won't stop the next draw (which may also be replaced by Underrealm Lich's ability).