I also heard this, and thought it was very sad. I have every sympathy for parents and children going through this, especially with regards to the delays in accessing mental health support.
But it also really troubles me to hear the same threads of overly-restrictive gender roles and body/soul ideology yet again used as justification (even in the vaguest sense) of why a young child is or may be transgender.
Of two early examples of the child's disconnection from their birth sex, one was that they wanted to wear sparkly shoes (and were told not to). I feel like I've heard this type of thing so many times (including stuff like 'as soon as you'd put a bow on her hair, she'd just rip it straight off' about a toddler), and I don't understand why it should be presented as anything remotely significant. That it should be given as one of the primary examples is troubling. I appreciate that parents may feel pressured to produce examples, in retrospect, of dysphoria, but all it really shows is that the child wanted to contravene the most minor of gender rules (sparkle is for girls) and was firmly told they couldn't.
And it was very sad hearing the child say 'god made a mistake' with her body, and that she had a girl's heart - sad that she should think that at all, and sad that noone's pointing out that it's ideology, not fact.
I appreciate it's a conventional religious belief, but I can't see how it's healthy for any child to believe their physical form has been created and gifted to them by a third party, and that their soul/heart has been decanted into this body via a fallible process where mistakes may sometimes be made. I wish we could tell kids that their body is their body; that it's beyond the question of mistakes and creators, that it simply exists and they're free to use, modify, clothe and decorate it as they see fit.