Actually there is some evidence.
There is, for instance, no trace of it historically from the time it supposedly was written until it showed up centuries later.
It sat in the Vatican library for about 400 years, if I recall. The thinking at the time was, it shouldn’t influence how Popes are elected. Turns out the wisdom held, when during one election after the prophesies resurfaced, an ambitious Cardinal loaded a boat full of sheep and sailed it up the river outside the chapel where the election was to be held.
Benedict, an Olivetan, obviously fits ‘Gloria Olivae’, but it doesn’t count since the election happened after the prophesy resurfaced.
It’s become a recipe more than a prophesy now. “We need an Olivetan this time!”
Next Pope will call himself Peter, not because I’m a prophet, or Malachy was a prophet, but because his prophesy became prescription.