I'm not sure I understand, it does exist, it's called Ligamentolysis. If you meant to ask or say will there ever be a procedure that guarantees erect length, well then that would be more aptly put.
When considering length, you'll have to appreciate the challenges posed by our anatomy to understand why length gains are much harder to come by than Girth gains. Length is possible with the aforementioned ligament-severing procedure, but I understand the frustration of not being able to determine if (1) any gains are guaranteed, and (2) the extent of those gains.
Hopefully either Ligamentolysis improves through some innovative technique or a new procedure altogether surfaces. My guess is that stem-cell advancements will be the future of Phalloplasty, when the science is so common that elective medicine can employ its benefits. That said, the current methods are viable (especially for Girth), and if you're under-average in length, Ligamentolysis performed by an experienced surgeon is worth consideration.
bobbi_camacho wrote: Ligamentolysis doesnt increase length per say. It just makes ur penis hang lower. And the gains r minimal. Maybe 2-3cm of Flaccid length. Assuming u stretch regulary afterwards.
I suppose this is arguable, as in if we're dealing with technicalities; if by severing the ligament you yield more penis to protrude, and thus more penis to stretch, you've effectively lengthened it, no? I mean I understand what you mean in that the original organ itself isn't lengthened, but you do have more "after" than "before."
And yes, the stretching protocol is important to cement gains, much the same way you'd do with manual PE exercising.