Alright! Tbh it's hard to see the line sometimes, and it's impossible having a discussion with someone who just wants to launder some right wing view through a veneer of "just asking questions".
I (not the person you're responding to) make no claims that she has called for laws to execute kids. I do agree that anti trans laws that JKR advocates for will kill children, but the added layer of "via depression-induced suicide" is something hard to prove and easy to shift responsibility around.
I'm not British though. Maybe she's also argued for some sort of "death penalty for going into the 'wrong' bathroom" type law. I wouldn't know.