
There’s a term for this I believe! Degendering, is a term used to describe removing the gender from a person or item. The same way people will “they/them” a trans woman who uses “she/her”, people who only refer to trans *men* as “transmascs” are, knowingly or not, degendering you. And that IS a form of misgendering!
I feel like sometimes people use transmasc as an umbrella term for any masculine trans people. But as someone who identifies as trans masc, not as a trans man, and also not as “nonbinary” (as my identity label, I recognize that anything beyond m/f is technically nonbinary). There are many genders and specific definitions/labels so that people can most accurately describe how they identify. So yea I would never call someone who I know is a trans man, “transmasc” cause ik that’s not accurate