It really bothers me how often trans representation in media feels like an afterthought in the story. We are rarely shown much about the trans characters' lives; when we do it's not substantial. More often than not trans characters are seen as a write-off bit, nothing more than a punchline. Even Birdo from Mario bros who is often seen as the first transgender videogame character and an icon for the community is referred to as a "boy who thinks he is a girl" in the game's manual.
Fun fact Samus from Metroid is often labeled as one of the first transgender characters in video games as the lead developer called her a transphobic slur during an interview.
The majority of characters who are often viewed as positive depictions of trans rep are often not even written to be such. I feel this is very telling of the quantity and quality of genuine trans rep out there.
Even when the media treats the character like a person it often only depicts a cycle of never-ending suffering or sadness for these characters. Often times this suffering is portrayed as a direct result of their identity. Lily from Zombieland Saga is a young transgender girl and a zombie (long story watch the show it's good). Throughout the series, the show would do episodes focusing on each of the girls in the group's backstory and how they died and such. Lily's episode depicted her DYING OF SHOCK because she noticed she grew a single facial hair. This episode made me cry. Not in the way movies and shows tend to make me cry but in the "oh shit" way. I don't know how to describe it other than the fact it made me feel hopeless. That the only way I would be able to feel like a girl is if I dropped dead.