Did oskar ever really realize how much he had done?

In "Extremely Loud and Incredibly Close" by Jonathan Safran Foer, Oskar Schell embarks on a quest to find the lock that matches a key left by his deceased father, symbolizing his journey through grief and understanding. Throughout the novel, Oskar grApples with complex emotions and experiences that shape his perspective on loss and connection. By the end, while he may not fully grasp the entirety of his impact or the depth of his actions, he does begin to comprehend the significance of love, memory, and healing in the face of tragedy. His journey suggests a growing awareness of how his efforts to connect with others reflect both his pain and his resilience.