I don't know where you're getting your information (if it's just the TLC show, I don't think that's a good source) but nothing I wrote is incorrect. I have several friends in the US who are transgender, many of whom I have known since we were all teenagers (via the internet). I also have several transgender friends here in the UK (I am a part of several LGBTQ communities). Children are only allowed puberty blockers in the US and UK if it is agreed by doctors, including gender specialists. Puberty blockers are 100% reversible. If they are stopped, puberty will proceed as usual. What you are describing is that the genitalia are underdeveloped from taking puberty blockers, yes, but said genitalia would develop normally if the person were to stop taking puberty blockers, even if they stopped as adults. Many would rather die.
Puberty blockers save lives. I have no doubt that many of my friends would not be here today if they hadn't had access to puberty blockers as teens. Going through the wrong puberty for how they identify is part of the reason why trans teen suicide rates are so high.