Passing is a matter of individual people's perception. They have to decide, subconsciously, based on how they perceive gender, whether or not who they're looking at is a guy or a girl. Certain features that are commonly desired among women (high cheekbones, long fingers, whatever) might read masc to some random bozo on the street because he thinks "woman" is synonymous with fucking "barbie doll". You're relying on cis people's stupid no-brain perceptions of gender, it is going to be a dice roll.

It still sucks to get misgendered obviously, but who passes first and in what contexts is even more of a dice roll.

Also, if you present as the gender you want to be perceived as, it might help. Although you already pass right now, you posted about it before, so there's that too.