NDEs are delusions given by Satan.

Rev 12:7 Then there was war in heaven. Michael and his angels fought against the dragon and his angels. And the dragon lost the battle, and he and his angels were forced out of heaven. This great dragon—the ancient serpent called the devil, or Satan, the one deceiving the whole world—was thrown down to the earth with all his angels. Then I heard a loud voice shouting across the heavens, "It has come at last— salvation and power and the Kingdom of our God, and the authority of his Christ. For the accuser of our brothers and sisters has been thrown down to earth— the one who accuses them before our God day and night.
2Cr 11:14 But I am not surprised! Even Satan disguises himself as an angel of light.
Eph 6:11 Put on the whole armour of God, that ye may be able to stand against the wiles of the devil. For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places.

Satan is a wicked spiritual being. The bible teaches us that in appearance he can take on many forms. He can translate to many places. Remember, he is a spirit-being who does not have the limitations of the human body. What locations can Satan travel to currently? Job 1:6 shows us that he comes to the heavenly court to interact with the heavenly beings. He cannot defy God's will because he is subservient to Him. Rev 12:10 also confirms that Satan appears in the heavenly court "day and night" to accuse the brethren before God. At one point he was cast upon the Earth. Job 1:7 says that Satan "patrols the Earth watching everything that's going on". 2 Pe 2:4 Hell is his residence.
In Rev 12:9, we are told that Satan was the one who deceived the whole world. How could he deceive the entire world if he was limited by our sense of time? Because he isn't. One day on earth is the equivalent of what would be like a thousand years in the spiritual realm. (Reference verses are 2 Peter 3:8, Psalm 90:4).
Isa 14:12 "How you are fallen from heaven, O shining star, son of the morning! You have been thrown down to the earth, you who destroyed the nations of the world. For you said to yourself, 'I will ascend to heaven and set my throne above God's stars. I will preside on the mountain of the gods far away in the north. I will climb to the highest heavens and be like the Most High.' Instead, you will be brought down to the place of the dead, down to its lowest depths. Eze 28:13 (God is speaking to the King of Tyre in this verse. But he is reminiscing about his past experiences with Lucifer). You were in Eden, the garden of God. Your clothing was adorned with every precious stone— red carnelian, pale-green peridot, white moonstone, blue-green beryl, onyx, green jasper, blue lapis lazuli, turquoise, and emerald— all beautifully crafted for you and set in the finest gold. They were given to you on the day you were created. I ordained and anointed you as the mighty angelic guardian. You had access to the holy mountain of God and walked among the stones of fire. "You were blameless in all you did from the day you were created until the day evil was found in you. Your rich commerce led you to violence, and you sinned. So I banished you in disgrace from the mountain of God. I expelled you, O mighty guardian, from your place among the stones of fire. All who knew you are appalled at your fate. You have come to a terrible end, and you will exist no more."
Lucifer and 1/3rd of the angels were cast out of Heaven after they attempted to overtake God's kingdom. God took away Lucifer's beauty and now he is known as the "great dragon" (Rev 12:7). God also changed his name to Satan, which translates into "the accuser" in Hebrew. Then the Creator gave him a kingdom of his own, Hell. It was not exactly what Lucifer had in mind.
I believe most NDEs are delusions given by Satan. Those NDE experiences do not teach about the need to repent of sins and turn to Christ so one can be saved. But a true NDE should teach the individual something of value on a biblical level. It should be a warning to them if they are headed to Hell or a comfort to them if they are on their journey to God's Kindgom of Heaven.