Well, we do. Even if you can discard most of the reports as hoaxes, or attribute them to shoddy methodology, there remains a fraction that is totally valid.

Just for the record, I don't distinguish between mind and soul. There is no soul, and I must stress that mind is a (series of) state(s) of brain. The software is always hardware. There is no nonphysical software somewhere out there. Furthermore, information-energy-mass equivalence is a demonstrable fact:

https://senderspike.medium.com/absolute-equivalence-b4584dc2e290

As for the actual mechanics, which we can make some educated guesses about despite being inconsequential, see my other reply to you:

https://senderspike.medium.com/none-that-im-aware-of-that-are-not-total-bs-e-g-a4dfb61259dd