The NDE does not address the afterlife per se since no one who has an NDE makes it to the Summerlands. This is why there are inconsistencies between the reports from spirit (human-spirit communications ala Leslie Flint recordings e.g.) and the NDE as commonly relayed.
If you are looking for afterlife evidence, i.e. evidence of the ethereal planes (spirit world) the two best tools that offer such evidentiality are incarnate-discarnate communications and physical mediumship. The first is best exampled by Independent Direct Voice (IDV) mediums (Flint, Sloan, others) which allow their physical bodies to be used to create ectoplasmic structures - often voice box similar - to transfer spirit thought to physical auditory vibrations (sound). Conversations can commence.
The second tool of afterlife observation is the materializing physical medium (Higginson, Best, Duncan, dozens of others) who cooperated with the spirit world in generating ectoplasmic "shields" for the covering of spirit bodies which apear as solid, physical entities on our earthly plane. Fully capable of speaking, feeling, being touched, heart-beating, vocalization, walking, etc.
Both the IDV or ectoplasmic materialization enjoy the single empirical requirement for evidence (proof) of the continuity of life, the ethereal plane, the afterlife. They allow for the communication of discrete information that only the spirit and the incarnate can know. That is impossible of being known by the medium.