it has its origins working for D&D iirc, then they split off and made their own D&D with blackjack and hookers when everyone got mad at 4e

I always assumed it was just an official setting for continued 3.5 games. I only learned early last year that it was from a different company.

But Pathfinder 1 was basically just 3.5 in a different setting.

Pathfinder 2's it's own thing, like if the designers of 4e had a chance to try again. Because, uh, that's a lot of what is actually is.