What evidence is there in the passage that the narrator Jake Barnes is part of the lost generation?

In the passage, Jake Barnes exhibits characteristics of the Lost Generation through his disillusionment and sense of aimlessness following World War I. His struggles with identity and purpose, along with his relationships marked by emotional detachment and existential questioning, reflect the broader themes of disconnection and disenchantment prevalent among his contemporaries. Additionally, his cynical view of society and the search for meaning in a post-war world underscore the defining traits of this literary movement.