NDE have been recorded for years. There have been plenty of scientists studying it. There are thousands of events. It IS possible to take those events and build a statistical model that gives the main points of the process.
Can it be confirmed but a third party? I am not sure how that would be “rigged” but no, that experience is a one at a time thing.
Just because it doesn’t fit in with your view of the afterlife, religion, or God, doesn’t mean it is not real to the people who experience it.
The worst part of any religion is its rigidity to being “right.”
They cannot ALL be right. And by the time we find out, it’s too late to tell anyone else. So…anyone getting too worked up about this stuff should check themselves. It’s OK to listen, think about it an not believe.
A good discussion of NDEs are in this podcast:
https://podbay.fm/p/where-is-my-mind/e/1567666860
The rest of the podcasts in the series are also interesting imho.