A couple of years ago, I visited a lady who "gives" reiki.
She seemed to be wholly genuine in her belief. She maintained she could sense my energy field quite clearly, even with her eyes closed. I asked her if she could then tell , with her eyes closed, when I moved. She said "yes", but when tested, could not.
The whole idea that energy can be transmitted to a person miles from the sender , without allowing for such problems as locating the receiver on a spinning planet, seems deeply silly. If it worked, I think a number of intelligence agencies would use it for assassination. (Of course reiki "masters" will say the energy is always benign, but energy is energy. If it can make you well, it could make you unwell.)
Fortunately, it does neither, as it does not exist.
What I suspect does exist is the ability to diagnose some medical conditions from subtle cues of body language. I suspect some alternative healers have that ability to a reasonable degree, but mistakenly believe their ability is due to a psychic gift, rather than to unconscious observation.
(I suspect doctors who are good diagnosticians have the same ability, augmented in their case, by actual knowledge).