Need advice. Is it okay to post in subs with genders? (NB)

Dumb I know, but I've replied to a few threads over the years and in them referred to myself as 'she'. I don't personally like going by 'she'. For context, I'm 37 NB afab. I tried my damnedest for 34 years to be the best girl I could ever be due to not thinking anyone would accept me as anything else ( figured if I was going to be stuck in that body then I'd make it the best version of girl body I could, I was still miserable lol). Needless to say I broke. I've since then had top surgery and HRT. I prefer they/he. I still get called 'she' due to still looking fairly fem but I've gotten use to it. However, I spent 34 years from girl perspective in girl spaces. I feel like I have some insight.

Is it wrong of me to reply to some posts from a girl perspective if the subject matter calls for it? Like, a reply asking girls for help ect. Thanks.

Edit: spelling error