Yes there are Levi Eliaphas’s writings on the Sabbatic Goat/Baphomet. His Baphomet was based on a combination of testimonies from witch trials and templar trials records, gnosticism and alchemy likely had quite the influence too. There is this drawing of the Puck who might be the same as Bucca with breasts, but those could just be to relate him to a plump Dionysus, or it could be to show some androgyny. and the old devil tarot trump had what could be seen as breasts.
Its also important to note that traditional witchcraft is not reenactment of how witches connected at a certain time period, its connecting directly to the spiritual forces that reveal themselves now and throughout time. It is very possible that the tradition of the goat god being androgynous/hermaphroditic only goes back as far as Levi. It may be that the Goat god first appeared that way then, in response to a need it saw in the world. And since then there has been plenty of confirmation—so he has kept up that way of presenting. And witches who used his book as a guide incorporated it since the 19th century to now. The thing about witchcraft is it really evolves through the times based on what it is counter culture to and expands to incorporate innovative spiritual philosophies. For witches it doesn’t take long for those who are connecting the same spiritual forces to find one another either in person, online, or at the witches sabbath.