Yes I know that in this world, futanari were created by scientist.
And a pre-op transwoman would not be one stricto sensus.
But, it's the same debate that IRL with post-op transwomen.
They where not born futanari. But after some operation they a pre-op woman would look like an futanari. And in her(his/their?) mind, she could see her like one.
So how society will consider them?
I suppose it would be the same that like with post-op transwomen IRL, depends on how open-minded you are.