Is my wound after a breast fat transfer healing properly? (Photos)

3 weeks post op lipo/breast fat transfer. All my wounds from lipo are closing up, even the bad ones from the sides, but one of the wounds from my breast fat transfer is still puckered/wide open. I’m surprised as I heard there wouldn’t be any scar for the breast fat transfer but liposuction. It’s about 5mm in diameter and 3mm deep since day 1. Is this normal? I’m worried the hole might be there permanently. I feel that a stitch would have helped it to close up but is it too late to get it stitched up now?