Would an umbilicoplasty or reverse tummy tuck repair my saggy belly button? (Photo)

A reverse tummy tuck is not a good option and does have a large scar. You would do best with liposuction to remove the excess fat. Your skin should do well with just liposuction.

Unfortunately there are not a lot of good options for a sad belly button.
In my opinion a reverse tummy tuck is not a good operation and the scar does not justify the benefit for most patients unless they already have breast lift/reduction scars or are going to have that procedure.
Umbilicoplasty as fancy as it sounds is just gonna leave you with bad looking scars. my vote is for well done liposuction of your entire torso.
It won’t help your belly button but will make you look slim and lean.
Delivering consistent quality liposuction results is more difficult than most people believe including a lot of plastic surgeons. If you find a really talented provider who has a proven track record with a collection of before and after pictures that reads like a telephone book with awesome results consistently then Liposuction can be an amazing procedure for those who carry a little extra fat in the wrong areas and have fairly good skin.
If you’re gonna opt for a tummy tuck then the standard tummy tuck is almost always the best procedure.
Best,
Mats Hagstrom MD