I'm not on hormones.
My personal experience is that the very fact that discovering I might be trans, and some time later seeing I probably am, and some time later realising I definitely am, has opened my mind regarding my attraction to men. Even before all this, I regarded some of them as handsome (the typical Tom Cruise you know

). During the process, I realised I liked one of my coworkers, I realised that when I was a child I actually liked a boy at primary school, and recently I even had a "wow who's that guy" moment, to my astonishment. A couple of weeks ago I was looking at videos by Veritasium on youtube and, it's true, I like that guy.
In proportion, it's till 96 girls for every 4 guys so I'm mostly lesbian. Funny because last month I used to answer "97/3" to that question... and remember, not on hormones yet. It's all within our brains.