As far as I know, it does not. Star Metal is one of the rarest and most sought-after materials in Conan Exiles. It's pretty much restricted to its intended method of acquisition, which in my opinion is a good thing. Some players have reported getting small quantities of Star Metal from Dungeon rewards on Siptah, and it is possible to acquire some Star Metal weapons from high-level enemies in certain areas like The Mounds of The Dead. However, if you're looking to acquire any meaningful amount, you should stick to the intended farming method.