Time limit for assessment/course - can I use a variable to extend for neurodiversity?

You are right, you can’t control that with a simple trigger. You would need two versions and input from the learner. I would think in terms of distinct scenes, rather than distinct courses, depending, of course, on how it is determined.If it is self-selected, and a high stakes time limit, I would think the selection would be a larger problem. You might need a more controlled access, which would call for two courses.