Transgender themes are not a deal-breaker for me.
This story though, to be honest, wasn't really easy to follow. It jumps around in time with barely any rhyme or reason or any explanation to put events in context of each other. Sometimes the main character herself is confused why things happen, and since we only have her point of view there isn't really an answer readily forthcoming.
I have so many questions:
So apparently, in her kingdom, princesses can marry commoners? Okay.
Said commoners can be girls, even transgirls? Progressive.
At the same time being transgender is frowned upon? Or is it just her parents who are intolerant? Confusing.
The main character claims to be good with children... Spoiling them rotten? More importantly, why is this relevant again?
Also, she is a prostitute/consort for a while. Okay.
Her pimp sabotages her efforts to earn him money by disclosing her past. Why?!
He claims he doesn't see her as a real woman. In front of the queen? How did that happen?
But he still forces her to have sex with him so she can keep her job. Is he a gay pimp then? Or some kind of fucked up tsundere ("It's not like I accept your gender identity and want you all to myself or anything!"). What is the character motivation? I don't get it.
Apparently, she was a prince once, implying that she married the princess while she was still male? But the first date happened when they were both girls. Which is it? Was there supposed to be some sort of Sweet Polly Oliver plot between the two events?
What beef did she have with the king? And what does it even mean for him to disown her when she is still married to his daughter?
A witch turned her into a girl "in body and mind". But she still has difficulty passing? How so? In what ways? And... If her mind wasn't that of a girl before, what made her consider she was trans in the first place?
So, yeah, from where I'm standing, this story needs some sort of coherent timeline and a lot of fleshing out if you wrote it for others to enjoy and give feedback.