Hiya, yes sorry I should have been a bit less ignorant and a bit more precise. Apologies.
What I mean, is that a cis-woman's pee hole is below her clitoris, right? So although it's not in her vagina, as you rightly say, it's surely close enough in a trans vaginoplasty for prostate ejaculate to spread into the vagina? It sits between the clitoris and the vagina, no? So on stimulation prostate fluid must surely spread into the vagina and lubricate it?
I do have stacks of prostate ejaculate which is nothing to do with sperm (I don't have testicles).
Mind you, I take your point about ejaculate vs pre-cum. I don't have a huge amount of the latter.
xx