Why Okonkwo never showed emotions in things fall apart?

Answer 1

Okonwko was inwardly pleased at his son's development and knew it was due to Ikemefuna, but does not show it to not be seen as a weak.

Answer 2

Okonkwo's inability to show emotions was largely a result of his fear of being seen as weak, stemming from his father's reputation as a failure. He believed that displaying emotions would be a sign of weakness and would undermine his status as a respected warrior and leader in the community. This fear drove him to exhibit a tough, stoic exterior even in challenging situations.