I admit that I don’t know what the research says on this topic.
Before I transitioned, I tried to date girls and then women. However, when I was presenting as a woman, I was really only interested in men.
The armchair psychologist might say that I was using a female persona to deal with internalized homophobia. Or something like that.
But that’s not true. My fantasies had never been about gay male relationships/sex; they had always been about straight relationships/sex. It’s just that I had always been the woman in those fantasies. In other words, transitioning allowed me to have an authentic dating and sex life.