Trouble growing chest.

Male 29, 5'10", 212 lbs, 18% BF. What would you add to my chest day that would help my chest fill out? I'm aware that it may be a genetic trait the way my chest is shaped but I feel like it should be putting muscle in faster. Everything else is growing great.

Yes I am in a calorie surplus, this isn't my first bulk. I'm eating a minimum of 4,400 calories a day.