OK, let's go with the thought experiment. So little Ciserella is born AFAB and given a boy's name and they bribe the doctor to put an M on her birth certificate even though that's not legal, she's made to wear boy's clothes and indulge in boy's pasttimes. Luckily because we're living in pro-trans world they can't demand a surgical intervention on her newborn genitals.
Ciserella doesn't ever see or understand that her privates match what she feels inside and that they match the way that most people with those privates feel, because Ciserella's parents isolate her from birth. Instead Ciserella is shamed for her unmanly behavior by her relatives and discouraged from spending time with other girls.
At school Ciserella's teachers, however, encourage Ciserella from a young age to express herself in the way that she likes and to read books that she likes. It is ok to be a girl even though she started life being told that she was a boy, and in fact another boy at the school also turns out to be a girl partway through kindergarten. She is allowed to sit at the "girls table" and do "girl activities" even though she looks like a boy. Ciserella's parents are encouraged from an early age to allow her gender exploration and other parents enforce Ciserella's right to choose her own activities and appearance. Ciserella never has a bathroom accident at school and she never plays doctor with other kids so no one learns of her family's deception. Maybe she is worried that if somebody sees her naked, they will find out that she is a boy.
She continues to tell her teachers that she believes she is a girl and is allowed to use girls locker rooms and girls bathrooms at school without comment. Ciserella cries every time her parents cut her hair short. When she is interested in bras, she is made fun of and told that boys have to wear boy underwear and girls have to wear girl underwear. Ciserella becomes withdrawn, angry, and resentful. Her teachers begin to suspect that she is being abused but do not have concrete evidence, because when her family shows up at parent-teacher conferences, any reference to Ciserella's transgender behavior is greeted with a tight smile and silence. Her teachers pass around information when discussing about "students of concern" and make sure that Ciserella has plenty of opportunities to express herself. The transgender teachers at the elementary school develop an ad hoc support system for Ciserella and make sure that she has food and other things that she needs, because they know that parents of transgender children can attempt to violently punish them. They are watching her for bruises and neglect. They do not have to report Ciserella's trans behavior to her unsafe parents or to CPS just for being trans, and they cannot be sued for hiding that she is trans.
Around fifth grade she learns explicitly that in typical development girls have "innies" and boys have "outies," and she is very confused, because she has an innie but her parents have told her over and over again that she is a boy. She writes an essay about this for class, no wait she doesn't do that because the story would end. Rewind! Ciserella also learns explicitly about trans people and learns that she is what you would call "trans," because her parents think she is a boy and she knows that she is a girl. In Ciserella's world it is ok to be trans and your parents should not force you to have some gender or another. Ciserella even has a few nonbinary classmates now. Ciserella stays silent but is starting to suspect that something is very wrong.
When her parents try to put her on puberty blockers, which is only allowed after the onset of puberty, the doctors ask her about her experiences of puberty so far, and about whether she wants to take medication that will make her look more like a boy, or whether she wants to continue the way she is now. They explain that "doing nothing" will make her look like most of her average female classmates at her school. Ciserella explains that she is sure she wants to go through female puberty.
The doctors, apparently in some backwards insane world of trans supremacy where the transes have taken over the entire world and also forgotten everything about what it's like to be trans, explain to Ciserella that she isn't old enough to make that choice and that she couldn't possibly be cis despite all the evidence of her parents trying to force her to be trans, and they put Ciserella on puberty blockers against her will. Ciserella's parents force her to take the blockers somehow without leaving marks. Maybe they humiliate her in a way that Ciserella is afraid to talk about.
Ciserella complains to her female friends and at the GSA club that she is an AFAB trans girl who is being mistreated because she is not being allowed to control her puberty. Ciserella wants to grow up to be a woman, not a man. She doesn't want to take T shots and she doesn't want to grow a beard. She doesn't participate in sports or other group activities
Her teacher, a mandated reporter who somehow doesn't notice that her parents describe Ciserella as a boy but Ciserella has notes in her school file explaining her preferred name and pronouns, has a transition closet at school where Ciserella can don female clothing every day and participate as her chosen gender at school. In the long period when Ciserella would take puberty blockers as a trans child, being from 12 to 16, as she becomes increasingly aggravated with her parents' control, she continues to live the life of a boy at home and a girl at school. Somehow nobody notices what is happening and no one says anything to her parents and her parents never take an action so violent that it ends up on the CPS radar.
Ciserella understands eventually that her parents are abusive and when it's time to go in at age 16 to get her prescription for T, she asks to talk to the doctor alone. Her parents become visibly angry, which is the cue for the nurse to usher them out. She explains everything to the doctor and doesn't get the prescription for T. This is a weird world in which parents who are known to be abusive to their trans children experience no consequences, so we're going to assume that Ciserella's parents kick her out of the house now after giving her a beating and telling her that she's dead to them.
Ciserella has a bad couple of years where she has to use the support networks of her other trans friends, but her teachers and community support for young trans homeless people help her out. Because Ciserella is not visibly trans, nor is she trans even with an inspection of her physical body, she can even receive help from Christian institutions like the Salvation Army and she learns that even though she is a woman of trans experience, she is really just like her cis female classmates in every meaningful way (and in a lot of ways that don't really matter, too).
She couch-surfs for a while among her trans friends from school, whose parents all detest Ciserella's family. Her trans teachers go above and beyond paying for Ciserella's basic needs out of their salaries, and helping her to access assistance. The GSA comes together and helps her get a dress for prom so that she can go as a girl. People at school who have known her for a long time do still occasionally make mistakes with her deadname or pronouns, but in general she is flourishing and she is proud of herself.
Looking back on her life, in her thirties, Ciserella is confused as to why her parents went to all that expense, heartbreak, and annoyance when the school system was going to support her gender exploration anyway. And why had people ever hated trans people so much, the very people who helped her out and helped her to understand that deep down, she was really--cis?
She is unusually skilled in a few male hobbies that she was forced to adopt, doesn't mind comfortable shoes, and hangs out with the other later-transitioning trans girls. It isn't really that bad of a life.