All of the sources mentioned in the article describe the Romavisaya as a "legend". It's unclear whether or not it has a real connection with any ancient device,

All of the sources mentioned in the article describe the Romavisaya as a "legend". It's unclear whether or not it has a real connection with any ancient device, although some of the sources suggest that the legend was inspired by ancient technology (which would have been much more limited than the devices in the story). This article refers to the account as a "story", "legend", or "tale" deriving from "oral traditions". Since all of the actual robot content is repeatedly said to come from a "legend", I don't think the article's author is trying to convince you that this actually happened historically!