When they get a bit older, at most they can extremely rarely (due to people pushing against it, even though it reduces suicide rates and saves lives!) get puberty blockers.
Those can then be stopped with minimal consequences if they decide that's not something they wanna do. What is actually cruel is FORCING kids to undergo their AGAB puberty against their will.
We know they are safe, we know they save lives. The vast majority of uses for puberty blockers are still cis children that have early puberty.