As someone who spends a fair amount of time reading philosophy, I find that I have pretty strong commitments to physicalism/materialism (i.e. the physical world is all that there is, and all non-physical things can be reduced to physical objects). I’m also extremely confident that any forces that can affect objects over long distances have already been discovered (i.e. gravity, and electromagnetism), and as such whether psychic powers (of any kind) exist is an answered question: psychic powers are not a thing. Neither is speaking with the dead. Given my stance on physicalism, the concept of a consciousness surviving the death of the brain is just not at all viable.
That said, I’m open to being proven wrong. Not hugely open: anyone attempting to demonstrate the existence of psychic powers, or mediumship, are effectively claiming that all studies to date that have found only four physical forces are in error, and that there is an additional force/energy/whatever that the lump of carbon, hydrogen and oxygen known as the human brain can access (but only some of them), but other lumps of carbon, hydrogen and oxygen cannot. In terms of proportioning the evidence to the claim, this particular claim is going to require quite the mountain of evidence.