It appears to be a form of DBD (dielectric breakdown discharge). Setting aside the para-physical claims, that aspect of it seems reproducible, as a fun science demo, at least.
(Are the original photographs available somewhere? I found only bad modern photoshoped versions, and even a guy that made a debunking video and then his photos were repeated as confirmation evidence.)
I agree, the Kirian photography is real, but the GP is taking about the paranormal claims, in particular the torn leaf https://en.wikipedia.org/wiki/Kirlian_photography#Torn_leaf_...
(Are the original photographs available somewhere? I found only bad modern photoshoped versions, and even a guy that made a debunking video and then his photos were repeated as confirmation evidence.)