Maybe they still do have the Kekkei Genkai, but there eyes just look normal when they are not using it.
Regardless of whether or not they possess it is irrelevant. They both look like Naruto and Hinata respectively and the it was just confirmed to be real. They are their children.
That the thing, only the sharingan appears and disappears, the byakuyan is permanent you know
BUT this sounds incredibly fishy to me, spoilers get leaked all the time so once they are leaked thats it. Why take them down?? Unless they are fake and trying to cover it?
But if they are true, it still doesn't prove that they are NH babies since they don't have the byakugan.