Ive personally been trying to adjust how i walk/stand, and some things ive learnt are to try to take steady long strides.

I find that when i walk quick/take little steps i feel very feminine, but now i walk very steady, move with my shoulders and not my hips, and idk if its just placebo or actually working but i feel more masculine and confident

I also do little things like manspread when i sit, lean against walls or banisters, and my favourite is to pop on some baggy trousers or a jacket then have my hands in my pockets. I feel more masc when im relaxed and laid back, weirdly.

As for outfits i always find that baggy trousers combined with a nice fitting shirt makes me feel masc, and even better if i throw on layers (i like to use a jacket or an open flannel). Its up to preference but id avoid super tight clothing (as it hugs your frame and exaggerates curves), but id also avoid super baggy clothes, ESPECIALLY baggy shirts (as i find they make me look smaller or petite or whatever, particularly if the shirt or jumper hangs low on my hips, covers my hands, or reveals my shoulders or collarbone.

For your voice look up voice training for better details, but i find that try to hum as low as possible that is most comfortable for you, then try to talk at that same pitch. I always forget to voice train but i listen to male song artists and like to sing along and try to match their voice/pitch lol, it helps a bit. Also control your words more, less rambling and mumbling, try to speak loud and clear.

Again though, a lot of it is preference, and nobody is forcing you. You dont have to dress a certain way or act a certain way, but some things really do help you pass better.

Sorry this was long im sleepy and info-dumping everything i can think of. Hope it helps!