[kevingadd]

"Faking" isn't thinking about it right. There's no point in going through all the trouble of manually constructing a fake sky photo like that when you can just aggressively train a machine learning model to produce good-looking skies in photographs, which they appear to have done for the purposes of things like adjusting the brightness of the sky in night-time photos. In the end, it's not a question of whether it's "fake", just how much of the resulting photo is the invention of a neural net instead of the result of light hitting the sensor.

In the end photography like this is art, though, so if the person taking the shot is happy with it, then it's fine, probably. Just don't enter it in a competition with rules against retouching...