hey. look at me. you, person who Calls Everyone Guy. you are NOT going to wait for that trans woman you know to tell you she is uncomfortable with being called Guy. it is an unfortunate truth that trans women are trained not to create boundaries; she does not know if you are going to flip out at her for asking, so she might choose to just let it happen.
you are going to, BY DEFAULT, assume that she does not like being called Guy, Dude, or Bro. if you want, you can ask, but you are going to make it clear that you will accept an answer of “no”, okay? default to “girl”, ask if theres anything else shes okay with being called. treat the subject as an open conversation. okay? okay. you can go now, but close the door on the way out.