They may have used that term, but all it shows is that they are idiots.
Darwinian Evolution explains (or tries to) exactly what Darwin said, the Origin of Species, not the origin of life. How one organism develops into others.
Evolution, as such, has exactly zero to say about the origin of life, and less than that about physics and the Big Bang.\
I’ve always thought it highly amusing that some use the Big Bang Theory to “prove” the Bible is wrong and God doesn’t exist. Whereas the theory is just a restatement of Genesis 1:1, with a creator added. Suddenly the heavens and the earth came into existence.
I don’t argue against evolution per se or Darwinian evolution as it is quaintly and correctly defined, but the term Darwinism now covers far more than the Beagleman wrote about or probably envisioned. It connotes government science now and all that implies.