The definition of futanari is a person with b͟o͟t͟h͟ male and female genitals.
The ones in-game appear to lose their female genitals when they use the [Grow Dick] skill. That would turn them into shemales, not futanari.

Side note: Futanari without visible external testicles are dickgirls.

Dude, the game clearly has scenes showing both genitals, in addition to being possible to give birth through the uterus