It sounds very bazaar that he should see the future plan, definitions of people, Moshiach’s identity et al. None of Yiddish near death experiences I’ve heard of had anything like this. It is always about their own experience.
Another point to keep in mind that he/they are not Neviim. There was no, ‘Go tell My people.’ The Medrash relates that when R. Yishmael Cohen Gadol ascended to heaven to find out about the Gezeira then, an angel showed him a storage room full of very harsh decrees on the Jews. He said, when you gather together and answer ???, ??? ???? ??? these Gezeiros don’t see the light of day.
Just because something is seen above our domain it doesn’t mean that it will happen that way.
Even the predictions of Chazal of what times will be like before Moshiach comes, are open to interpretation. They can play out in a relatively mild way.
I can’t promise this boy didn’t see what he says, or partially. But it is strange. As for the autistic communications, they seem authentic even though their drastic warnings did not play out the way it sounded, BH. Perhaps this was a case of ?? ???? ????? ???????.