The novel's ending is ambiguous regarding the fate of the Lost Boys.
* They do not die directly because of Peter.
* The novel does not explicitly say they are killed by other means.
* The implication is that they simply cease to exist when they grow old, as Peter Pan's magic only keeps them children.
The novel suggests that the Lost Boys grow old and fade away, leaving only a whisper of their existence in Neverland. There is no mention of Peter Pan being responsible for their demise.
This ambiguity has led to much speculation and debate about the Lost Boys' fate. Some argue that they are killed by Peter Pan, while others believe that they simply cease to exist.
The most likely interpretation is that the Lost Boys simply vanish from Neverland when they grow old. This is consistent with the novel's overall theme of the fleeting nature of childhood and the passage of time.