Maybe it's splitting hairs, but I recall the "chaste goddess of the hunt" and one of the three goddesses whom Aphrodite had no power. Additionally, goddess of healing, midwifery, and children. So I don't know if the contemporary understanding of Ace matches that or not, as she is unaffected by love or lust.
To add to what krellor already mentioned: It's hard to find one definitive image of a specific Greek deities, because they were worshipped over hundreds of years and not only in Greece, but also in Greek colonies (for example Sicily) and places that were heavily influenced by Greek culture (for example around the Black Sea). Most of these places had their own particular interpretation of what a Greek deity was or wasn't.
So it was no contradiction that Artemis could be a "man hating, out lesbian" in one place and an "aro-ace ascetic" in another. Unlike in modern monotheism, there was no overarching dogma people could refer to and places often had their very own myths and stories about the deities. Only some of those have survived until today.
So our modern interpretation of Greek deities is something of a puzzle with many pieces missing and no way to confirm if the pieces that we have ever were part of the same picture in the first place.
experiencing no sexual attraction no matter if one is sex-repulsed or sex-positive still lands you somewhere in the ace spectrum. and tbh you don't need to have kids of your own to be a midwife, or just in general care about them
My understanding of the classical concept of sex was that yes, sex was specifically the penetrative act, so it's entirely possible Zeus and Bros couldn't fathom what mischief women could get to on their own.
Artemis could totally go to Funkytown with her huntress desciples all she wanted without affecting her virtue, or brother Apollo feeling jealous. (That whole affair with Orion was, according to OSP, a Victorian era fantasy, with no prior primary sources.)