norse mythology: the bisexual dude who has a meathead son and an adopted genderfluid kid. doesn't go anywhere without his horse-grandson. knows everything will go wrong when they get a dog.
Plus they associate war with masculinity and magic with femininity, and their main guy is the god of both. Women fought and men learned magic. Clearly gender was a pretty flexibly concept. (Not to even mention that we found what appears to be trans masc viking burials.)