It is absolutely possible, and it has been done in cisgender children with precocious puberty for decades.
> Puberty blockers alter hormones dramatically during critical growth phases.
Which is generally the goal. It is of course not possible to retroactively have allowed puberty to progress as though the blockers had never been taken, but it is possible to cease the blockers and allow it to resume, again, as is done for cisgender children who take them.
It almost feels like you're arguing definitions.
> It is absolutely possible, and it has been done in cisgender children with precocious puberty for decades
Precocious puberty is a condition in which puberty happens earlier than it's supposed to.
The goal of puberty blockers in precocious puberty is to delay puberty until the correct age and physiological growth window.
Puberty blocker in precocious puberty are also not used to induce hormonal profiles that are different than the body's eventual genetic set point, just to delay them until typical puberty ages.
Delaying puberty until it aligns with the body's expected pubertal ages is completely different. You cannot extrapolate and claim this as evidence that we can safely delay puberty until adulthood, well beyond pubertal age.
> but it is possible to cease the blockers and allow it to resume, again
I don't understand what you're trying to claim, but ceasing the medications does not reverse the changes they made during critical teenage growth windows.
I had a brain injury when I was 12 that knocked my testosterone levels way down.
In my 20s this was discovered and I went on testosterone replacement. My hands are still the same size as my mom’s. My feet didn’t get back to the size they were before the accident. I didn’t regain the height I lost. God only knows what it did to my brain.
Maybe if you’re only on them a little bit you’d be fine, but the whole concept is bad. My wife fainted when she got her first period. Why? She didn’t want to be a woman. She was a tomboy. It turns out that the flood of sex hormones during puberty can actually make you feel like a woman/man, which should surprise no one. To block that from happening and potentially effectively treating the dysphoria is madness.