While I have no idea what the cannon was, my Mass Effect 1-3 Shepherd was a Bi dude. He started a relationship with Liara in the first game, continued it into the second game, and discovered there was something there with Kaiden the whole time and broke up with Liara to be with him.
While technically the game wasn’t advertised as having a queer lead, I feel like I got that with the first trilogy and it was the first game series that I felt treated orientation in a honest and genuine way.
While the ability to choose your character’ orientation is great, it does seem like being straight is the default or only option, with queer identities relegated optional paths in big budget games. I think we’re making progress but I’d like to see more.