(Thanks! Glad you enjoy the thread! c:)Â
To answer your question, being a trans guy myself, I personally always use masculine vocabulary when talking about me in the past tense, including the parts of my life when I didn't know I was trans. All the other trans people I know work that way too, even if I'm sure there are exceptions. But yeah... personally I would say it would make me uncomfortable to read a story worded this way, because it would insinuate that your character "used to be a girl", if that make sense? Some trans peeps may accept this definition but it's safer to avoid this kind of language unless you know the person's personal preferences.Â
As an alternative I would suggest to respect your character's gender in your narration, but keep the obvious misgendering in dialogue. Revealing a character's deadname is... a touchy subject, and I personally don't recommend it unless it's crucial to the story. Maybe you can try to censor it in dialogue? (ie. J***e instead of Julie) So your readers will understand you're referring to his deadname without actually revealing it.Â
That's just my opinion tho! Ultimately you're free to do whateverÂ
Edit: Oh yup Milkweed's questions are interesting too, and something I forgot lmaoÂ
((Sorry if there's any grammar mistakes I'm tired lel))Â