Sensory outcomes are complex ... we conclude that outcomes often do not match expectations, which causes dissatisfaction in a proportion of participants ... discuss the considerable probability of having to face shortcomings with regard to the esthetic and/or functional outcomes as well as a reduced sensibility and long recovery time
pmc.ncbi.nlm.nih.gov/articles/PMC8498953/
The objectified sensitivity of the neophallus, measured by the SWM test, was significantly reduced compared to that of the donor-site, with the proximal part being more sensitive than the distal part. While we found evidence that sensation improves over time, it remains unknown, when sensory recovery stabilizes and at what level. Several previous studies showed that sensory recovery of the neophallus after nerve coaptation is possible for various flap techniques, but the overall tactile sensation recovery remains suboptimal in all presented techniques.
(It was noted that the trans men thought the sensitivity was better than it really was. The researchers put this down to improved self-image.)
pmc.ncbi.nlm.nih.gov/articles/PMC8498953
Provided that patients have experienced clitoral orgasm before surgery, clitoral transposition does not result in a subsequent loss of ability to achieve orgasm with direct stimulation of the clitoris site.
In our experience, many patient’s report lack of familiarity with their genitals (e.g., use for sex, exploratory touching). Such lack of familiarity may predict for poorer sexual function post-op: two of the three patients that had never experienced orgasm before surgery reported an inability to achieve orgasm after their surgery.
pmc.ncbi.nlm.nih.gov/articles/PMC4708164/
Lowest scores in satisfaction were observed for the sexual functioning of the neophallus, with 34% satisfied to very satisfied participants.
https://www.sciencedirect.com/science/article/pii/S1743609521003027
Most reports give very high levels of satisfaction, including sexual satisfaction (80% - 95%). Reading many different sources, though, it seems that only satisfied patients opt in to the follow-up studies. Most of the studies only covered 10 or 20 participants - the one showing 34% sexual satisfaction had 102.
As Scott Newgent explains, these surgeries are brutal, very experimental and come with no guarantees.