I have a niece (assigned female at birth) who is about as girly and female as one could get. Absolutely stunning looks. Everything about her oozes femininity and being a woman. And I know for a fact that she has absolutely no desire to have penetrative sex with a male because she is a lesbian and has felt this way since as far back as she can remember.

I don’t think strapping on boobs and a wig makes one’s sexual orientation change.
Dressing as a woman, simply creates a vehicle for having same sex experiences more tolerable to the mind.

My sexual orientation doesn’t change when I dress as a girl. What it does is create a vehicle where I can express a feminine side of myself that is more tolerable than doing so in boy-mode.