Hephaestus was what I was thinkin of, though on the subject of Automatons, I have always loved these things and have a collection of them. My grandmother had a mechanical bird Automaton and after seeing this one:Silent Protagonist said:Hephaestus has his automatons. Automaton is actually a pretty good keyword to search if you are looking for attempts throughout history to create robots, fraudulent or otherwise. Not necessarily mythology specifically but if you are simply looking for something to make reference to that could potentially be a good alternate source that may be less on the nose as Hephaestus.
If you want to move outside of real world mythology and into fiction, the Church of the Broken God of the SCP universe has all sorts of cool mechanical stuff, ancient or otherwise, to draw inspiration from.
https://www.fi.edu/history-resources/automaton
I actively started seeking them out to collect. My grandmother left me her bird, but I also managed to get a weird cat, two clocks, one with people and one with a bird, a monkey and a strange mechanical robot, all of them are mechanical. I also have a variety of music boxes and some electric ones, but I don't find those nearly as interesting.