Wow, I didn't not know they could transplant a penis. That's amazing although a bit frankenstein and I'm not sure how I would feel about one being used on me.
But as the other poster said. There will be a limit to how many penis are available. Do male cancer patients or injured males take priority over transmen?
I would think a biological man should have priority because it's about restoring what was/should be there. But a trans person would argue that for them a penis should be there. But it's not the same in my eyes.
I'm confused by the testicle thing. So if you transplant testicles onto a new man, the testicles keep producing sperm with the dna of the donor not the recipient. How does that work.
I think because the donor is dead, and there is no potential fertility, it doesn't raise the same ethical issues as with womb transplants. But I think due to lifelong immune suppresent drugs and decisions about priority of recipients, it's a shaky path to go down.