How realistic are the extraterrestrials in Alien: Earth?

https://theconversation.com/alien-earth-how-realistic-are-the-extraterrestrials-three-experts-rank-them-263553 

If this world is part of a cosmic simulation, then someone might occasionally want to insert various monsters here, ETc.

https://www.popularmechanics.com/science/environment/a66050444/simulation-theory-new-physics-law-infodynamics/

 

 https://thedigitallabyrinth.blogspot.com/search?q=Alien-Earth