Hello, an umbilical float abdominoplasty typically involves detaching the belly button and reattaching it at a slightly lower position on the abdomen. The operation might be combined with muscle tightening (rectus plication). In contrast, usually with a mini tummy tuck the umbilicus is left...
You are probably feeling the knots of the permanent sutures used to tighten your abdomen. If they are too bothersome, they can re removed surgically through your lower incision. This can be seen when there is little fat in the area.
Based on your muscle separation a tummy tuck is recommended for you. This would involve removing excess fat and skin as well as repairing abdominal wall laxity. Less invasive procedures may tighten skin and/or remove fat but they cannot address the diastasis of your abdomen. I encourage you...