No, the parent said that the numbers of trans people have increased. That's not true. The numbers of trans people able to get treatment is the thing that increased. We went from not counting, to counting. So we didn't increase the number of trans people, we just started counting the trans people that always existed.
I'm pretty sure that it's clear that he meant diagnosed cases. Otherwise the text doesn't make sense. You don't ask "Could the reason for more people with X be more people with X?".
