Your problem is what umbilicoplasty procedures are designed for. They're different for every patient, but it usually involves removing the extra skin and/or scar, and hiding the incision as much as possible. Because you have a piercing above the navel, there would also be a small vertical scar there, but the idea is to trade a scar for all the loose skin and the piercing hole.
yes I would consider doing an umbilicoplasty for you from the pics that I see. need a small incision at the superior umbilicus. you have skin that needs to be removed. this will create more of an innie belly button.
look for a board certified plastic surgeon for best advise.
Your photos suggest that there may be some degree
of Rectus Muscle diasthesis as part of the umbilical
appearance concern. A consultation by a board certified
plastic surgeon will be help you identify the anatomical
problem and best option for treatment.