I had the same fear. I still have lots of muscles and no curves besides my full B cup breasts and I pass always
Loosing weight helped for but if your face, hairs, voice and breast are considered female you should pass in a bikini. I needed surgeries for face, voice and press but I never will remove a rip or get bitten implants
In the end face and hairs are very important and breasts will also help a lot in terms of your body. Your voice of course van destroy a lot of your passing