Due to the feminine and masculine contents in the grave, researchers had two theories – two bodies, a man and a woman, were in the grave
More recent DNA testing confirmed the grave only held one person... Klinefelter syndrome results when a male is born with an extra copy of the X chromosome. The syndrome sometimes results in males developing enlarged breasts
https://www.usatoday.com/story/news/world/2021/08/10/nonbinary-leader-found-1-000-year-old-grave-finland/5550578001/