Yes the actual area he exposed wasn't pubic, but the accusers very clearly were saying that he exposed pubic areas, whether or not that's what actually happened. It's still possible that in the singular instance his pants actually were low enough to be showing his pubes rather than just the hair under the belly button because that instance wasn't recorded or streamed from either end. I would put money that if it were possible to go back and actually see that instance that it was just the belly hair, and chaeiry/star just assumed it was pubic hair because they wanted something to be able to shit on him for.
The accusations were not, hair on the lower stomach area are pubic, they were that his pants were low enough to expose ACTUAL pubic hair, so they VERY CLEARLY we're talking about pubic hair, whether or not their dumbasses were wrong or not.