I guess my bigger point was just that I’m extremely cynical about cis writers writing trans characters

Considering the absolute train wreck most trans "representation" in AAA games is, i am too lol
Mass effect andromeda comes to mind
"I came to another galaxy to escape my deadname... it's Dave btw" (paraphrased)

an escapist fantasy where I can play an objectively trans character and no one in-universe makes any sort of deal about that whether big or small.

That's pretty much my opinion when it comes to bi representation, just make it a normal thing and i'm happy