The ethical/morals:
Obviously from a religious viewpoint but generally?
Resource allocation as I mentioned is the big one. Resources are becoming only more scarce, and unless/until there is significant advancement that invalidates resource issues, you will see numerous changes in the medical arena in the coming years, including the tabling of non-vital issues such as this. (As however much I or others may want it, it isn't exactly a life threatening thing, and even from a dysphoria causing suicide approach is most likely barely on the radar.)
Human experimentation without consent in early trials is also a real concern. Even if you assume a fetus is not human until late term, at one point it will be human (as this would be setting aside any consideration of abortion or fetal stem cell type discussions, using only the least generous standard for what constitutes human life). Think about it like this: Pregnancy requires numerous hormones to function properly without causing damage to the fetus or risking its life outright. There are countless scenarios that hormone delivery may be inconsistent, interrupted, or so forth, creating a potentially chaotic environment for the development of the child. And that is just the hormone issue, who really knows exactly how a transplanted womb will perform to begin with.
Even with consent, any decent surgeon is going to be hard to convince to perform this surgery until everything else aligns and the procedure has become standard for cis-women born with uterine issues. Above all do no harm, and above even that don't get sued. Early partakers will face serious complications literally rearranging their organs to make room for a fairly large one--that's a huge deal.
I do believe that these are all issues that can be resolved, they will just take a while. (Well, except for maybe the resource issue. But if that isn't solved, we are all doomed anyway so it is a moot point.)