He's been involved in plenty of goals. Konsa vs sheffield, trez/saka vs arsenal, watkins vs Newcastle (in both legs), watkins vs Burnley, watTraore vs leicester all came through him. He's been very unlucky only one actually registers as an assist, but his attacking contribution has been huge.
The fact he hasn't scored is hardly an issue as full backs, along with defensive midfielders are usually the least likely outfield players to score