Evolutionary Psychology is the science of the role of evolution of human psychology. It's very versatile, used by mainstream academic scientists like anthropologists but also PUA and HBD/race realist types of people. However, it has many flaws because it can't yet make good predictions, only describe the past. Some have even called it a pseudoscience because of the many different factions twisting it to fit their own worldview.
There are a few things which PUAs have claimed to be evolutionary psychology, but likely seem false/only in modern Western societies-
-The feeling of it being "unnatural" to approach a girl, ostensibly because she's owned by some stronger guy and so is dangerous
-The concept of a "bitch shield"