Maybe it's not quite hand-positioned for every screen, but with the level of detail necessary in the constraints for a constraint solver to be able to do it, I

Maybe it's not quite hand-positioned for every screen, but with the level of detail necessary in the constraints for a constraint solver to be able to do it, I think that might as well be considered hand-positioning in some sense. Also, it's only anecdotal, but in ~10 years of installing day-1 betas of iOS, I've yet to see an autolayout bug on the keyboard. Admittedly I'm using British English which I'm sure sees a lot of QA testing, but incorrect constraints would probably be a hot spot for issues, and I've seen autolayout bugs in a ton of other software, so my guess is still that it's not really that automated.