Would I benefit from a belt lipectomy or tummy tuck?

you would be a good candidate for a belt lipectomy. If done correctly it will enhance the appearance of your buttocks.

Dear Yalie8,
Thank you for your question about the benefits of a tummy tuck versus a 360 circumferential lower body lift, especially in relation to your concerns about buttock contouring.
Tummy Tuck vs. 360 Circumferential Lower Body Lift:
Both procedures include a tummy tuck, addressing the abdominal area. The key difference is that the 360 circumferential lower body lift also involves the back and buttocks.
Buttock Concerns:
Don't worry about the thickness of your skin or popping stitches; thicker skin on the back and buttocks is typical.
Consider your goals for buttock surgery: Is it to reduce wrinkles, change volume, or improve proportion?
Options for Buttock Contouring:
Volume Reduction: Extending the incision from the tummy tuck over the buttocks can remove excess skin and fat for a smaller buttock size.
Lifting and Wrinkle Reduction: If you're looking to lift the skin and reduce wrinkles without changing the volume, the lower body lift can achieve this by lifting the skin alone.
Augmentation (Making Buttocks Bigger):
Propeller Flap: Rotates fat from the upper buttock to augment the area.
Brazilian Butt Lift (BBL): Utilizes fat harvested from your abdomen (during the tummy tuck) to augment the buttocks. This procedure can lift and increase the size of the buttocks.
Decision Making:
Decide whether you want your buttocks to be bigger, smaller, or just lifted.
For augmentation: Consider a BBL or propeller flap.
For reduction: A 360 circumferential lower body lift with skin and fat removal.
For lifting only: A 360 lower body lift focusing on skin excision.
In conclusion, your choice between a tummy tuck and a 360 circumferential lower body lift will depend on your specific goals for buttock contouring. Consulting with a plastic surgeon experienced in these procedures will help clarify the best option for your needs.
Wishing you the best as you make this important decision.
Sincerely,
Dr. Katzen

In your case, a beltectomy is not going to give you a much better result than a well-performed abdominoplasty, but you would have a longer scar.  I don't think you will 'pop the stitches'.  If you want enhancement of the buttocks, this should be done first and then the abdominoplasty can be done at a later time.