Great leanness. It’s obvious you watch your diet very closely (or have an insane metabolism). Not sure what you’re looking for as far as advice is concerned. Forearms and biceps could be improved, but not sure if ideal balance is your goal or not. For back development, you’re looking pretty amazing. Great definition of the teres major and rear delts. The erector spinae shows good balance with your abs (aka great core development).
Work on the traps, especially in the mid-back area. The upper traps/shoulder look pretty good. The lats are coming along but more width (using a wider grip for pull downs and pull ups) will give you a more balanced look with a more dramatic taper/v-shape which will add a lot. Great work.