Not even remotely? That’s a bit hyperbolic. I don’t think it’s a sim either, but it has some qualities of one.
There’s absolutely nothing in no man’s sky that’s meant to be a space sim in any way at all or even has any resemblance. It’s not hyperbolic. The dev has always called it an imagination of the science fiction idea of the 80s which is supposed to capture the feel of something that would be in an arcade.
Not saying it’s a bad game, but it’s not a sim. At all.