The closest thing I can think of that I myself could describe that way would be Alita: Battle Angel, due to the big eyes/small mouth style of Alita, but I would never actually call it live action anime, but rather, a live action anime adaptation.
Maybe this is related to modern speech patterns? The closest thing I can think of is “it’s giving x” which seems to me to be a shortened version of related phrase “it’s giving x vibes.”
On a related note, The Matrix actually has an animated spinoff The Animatrix, which has segments that are arguably anime, as they are produced by Japanese creators in a typical style.
However, I find that the phrase live-action anime perhaps says more about the person saying it and their perspective than it says about the content being described as such.