Is my belly button closing up? I had an FDL TT 1 week ago. (photo)

Thank you for your question and photo.  It is difficult to tell what is occurring based on your photo.  I would suggest following up with your plastic surgeon in person to be fully assessed.  Continue to follow your surgeon's instructions.  Best of luck to you!

 Following surgery for a tummy tuck operation that involves an umbilical inset it is not uncommon for scarring and wound healing to contract the belly button. Close follow up with your plastic surgeon is essential and massage to these areas may be helpful. Clinical trials or under way to explore the efficacy of micro needling to early healing of scars and improve long-term results. Look for experience practitioners in your area for assistance with Punta healing if you still have questions. Board-certified plastic surgeon’s are always the best option

This should be followed closely, as I am sure it is, with your plastic surgeon.  Some instructions for wound care may changed depending on his/her re-examination.  This picture shows loss of at least the superficial epidermis of the belly button skin, but without an in-person exam, the extent of tissue loss cannot be determined, and may not make itself apparent until more time has gone by.  Meantime, the goal is to keep the area from drying out and preserving tissue.