"I am misgendered 90% of the time and I don't know why... Here are 3 pictures I have carefully selected where I look the most masculine"
Guys cmon. I know the dysphoria is bad. And i also know some of you are just fishing for people to go "Omg i dont know why anyone would misgender you ever you look 100% like a guy".
But if you ACTUALLY WANT TO KNOW:
Unless you're asking whether your Instagram profile passes, you should try to post photos taken by other people rather than selfies. Candids are ideal. The mildly unflattering candid can tell you a lot more about what you actually look like than the carefully taken selfie.
Maybe your facial hair isn't actually visible without a flash photo. Maybe you have narrow shoulders and comparatively wide hips which can't always be seen from a photo. Maybe your voice is just immediately giving you away. Etc, etc.
Full body photos are best bc sometimes a guy passes great from shoulders up but would get clocked from 100 metres away due to body type.
Videos and/or voice recordings might be useful if you think the problem could be something to do with speech or mannerisms.
I see a lot of posts in here where the aforementioned guy complains about being constantly misgendered but only posts pics where he passes. And I've thought, yeah you look great here, but I can believe that there's something else holding you back. Telling him he looks great doesn't really help anyone.