It's always easier for coaches to give young players time on the pitch wide than centrally as there is less to the game tactically there. If Klopp thinks Woodburn still has a lot to learn off the ball, it's possible he won't use him in the middle until he is up to speed. I personally don't see any tactical weaknesses in his game, but then there is a world of difference between what I see and what the coaching staff would see in players.
Regardless, he's certainly perfect for our midfield and if we do end up seeing him get minutes out wide, the positive from that is it means it is because there is even more to unlock in his game. Frightening!