NO, they could not, because the past two hundred years of nothing extreme to that effect going on
proove there is no interest in nature and certainly none in human nature for such developments.
Herma fantasy is all over the internet with many flavors:
1-.- All the trans - men with boobs - who keep acting male
even after they undergo the treatments,
or
2-.- All the trans - damsels in distress - who have adopted the peculiar
high pitch and bothered way of aloof walking and talking and moving,
like a china doll aching at the ankles.
These are available sex workers who do porn and streams,
they certainly have no interest in any more experimentation for
a biology major about true hermas or whatever you mean.
the phenomenon is not so rare
why a human-like being couldn't naturally evolve or be genetically engineered to be a “true hermaphrodite”
Nothing is even remotely present in this game where primitive cult like tribal futa demons trade in male sex servants that they treat good or bad depending on their mood swings.