I want to give a shout out to a few such traditions:
Cronnekdhu (Cornish Pellar Witchcraft)
This is an incomplete list, just based on the ones I am familiar with.
Baphomet is a symbol often of this initiation beyond binary and a kind of spiritual alchemy. I know a lot of areas of paganism can be painfully heteronormative, so its nice to find some that look beyond gender essentialism.