Pitching hand is close to head

When my 9 year old son throws his hand goes right by his left ear. (he is a lefty)
His hand being much close to his body than his elbow.

Is that bad? Should we work on getting a more traditional motion?

No, that’s a good thing. it will allow is forearm to layback more through the driveline phase. getting his hand away from his head could cause greater elbow problems.