> as of today seems like there isn't evidence that ADHD stimulant medication helps with non-ADHD executive disfunctions

Because there is not much research into that, not because research presents evidence against.

"More research is needed to determine whether executive dysfunction in adults with complex PTSD who did not present with ADHD symptoms as children respond to and tolerate ADHD medications."

Ah yeah, that's why I was noting there isn't evidence that it helps (and not "there is evidence that it doesn't help"). I'll try to edit and add a "yet" to make it clearer.