Muffin top, hanging belly, and loose skin - Do I need a tummy tuck revision? (photos)

It difficult to fully determine what you need based on these photos.
You do need to have enough skin to stand up straight, so some laxity when sitting up is quite normal.
With that said, you do seem to have more laxity than I would expect after full tummy tuck. I would get a second and/or third opinion from board certified plastic surgeons. Having operative notes for them to review would be helpful as well.

Thank you for the photos. Everyone, including very thin young people, can pinch the skin of the abdomen in the seated position like in your photos. Can you do it to this degree in the standing position? If it's not that severe when standing, I would say you do not need a revision.

Dear Exquisite645710,
I understand your concern. However, without a proper assessment, it would be difficult to determine what went wrong. It is best that you visit your plastic surgeon for further assessment or ask for a second opinion. Only after a thorough examination, you can get proper recommendations and advice.
Daniel Barrett, MD
Certified, American Board of Plastic Surgery
Member, American Society of Plastic Surgery
Member, American Society of Aesthetic Plastic Surgery

HelloYou have significant stretch marks on your skin, which can lead to looseness after surgery. However, it appears that an insufficient amount of skin was removed from your abdomen. Unfortunately, you will need a tummy tuck revision.

Hello and thank you for your questions and your pictures. Although an in-person consultation will provide more details it appears that you have some excess loose skin remaining in your lower belly and you may benefit from a tummy tuck revision. I recommend you consult with a plastic surgeon who specializes in body contouring surgery and can adequately evaluate you and develop a treatment plan for you. Best wishes!