As someone on the spectrum myself and who has loved ones on the spectrum, I can tell you that some aspects of autism may actually be a superpower when it comes to ultramarathons.
Things such as repetition, especially long periods of excessive repetition, such you experience in most ultras, and especially in 24 hr track or short loop ultras, do not bother many of us. Many of use actually take peace and happiness from the repetition.
I myself am at a similar place on the spectrum as Camille, in what was previously known as Asperger’s. I had done marathons and ultras before and I would not even think of asking for an accommodation. Sure there are things about the race atmosphere that would cause be anxiety, but there are also areas where my autism superpower would give me advantages (I.e. enjoying excessive repetition). I consider it a wash. We all have strength and challenge, whether on the spectrum or not.
If I was on a governing body for the race, I’d only agree to her accommodations if she promised not to use her superpowers. Since she can’t do that then the event should not give her an accommodation.
She’s looking for an unfair advantage, to reduce her challenges while preserving her strengths, while everyone else has to try and balance both.
Her cry for fairness ring hollow, she isn’t interested in fairness to her competitors, but rather what gives her the advantage.