I didn't see Attis in this article by an actual historian on virgin births, but there are plenty of other examples.
Virgin Birth: It's Pagan, Guys. Get Over It. • Richard Carrier
"there were also full-on virgin births (at the very least, Perseus and Ra) and conceptions without sexual union regardless of the mother’s virginity otherwise (Hephaestus, directly created in Hera’s womb; Mithras, spontaneously born from a rock; and Dionysus, in the myth by which his mother Semele conceives him a second time by drinking a potion; and many more I’ll enumerate shortly), which are actually far more pertinent precedents of the the ideas stolen by the Jews to invent such a comparable miraculous origin for Jesus (in defiance of even their own logic that he was supposed to be conceived by the seed of David, or in any case the seed of his necessarily human descendants—hence Matthew’s genealogy for Joseph, for example)....
But borrow they did. Before Christianity arose, pagan theology was already awash with women conceiving asexually, and also promulgated the idea of women giving birth as still virgins. Judaism had no comparable idea. Even the prophecy of Isaiah 7:14 would have been read by Jews through a Jewish interpretational filter—a filter that lacked any other notion except that a virgin would conceive on her wedding night in the usual way—until they had a pagan filter to see it through. Only then, though Isaiah 7 never mentions a virgin birth (only that a maiden will become pregnant; not that she would then remain a maiden), would any Jew imagine it could have said what pagans might have imagined: that this mother will remain a virgin, thus portending a miracle. That step in reasoning is pagan. And only comes from a pagan milieu. The Christians assimilated their godman to pagan godmen, by Judaizing the pagan elements required. Thus, they preferred the pagan godmen who were fathered sexlessly by God’s pneuma and dynamis (a la Plutarch), upon women who chastely never had sex with anyone else either, so that even the vagina itself that the godman would pass through would be pure of sexual corruption. Ra came by such a way. Perseus as well. And if we allow revirginizing magic, Hephaestus, too. And if they, why not Jesus?"..
The exagarated Attis parallel makes it questionable if other virgin birth parallels are even true.