Even the most uneducated poster on here will agree that all nd children/ adults are unique and what works of one does not work for others.
Yep really true. But something else that's true is that for a large number of autistic or other ND people, our presentation is subtle enough that we'll have to live in a world which assumes we will be able to cope with what everyone else does. As OP's DD is 9 and as yet suspected but undiagnosed, she probably fits in this category of ND people.
It's hard to explain what I mean here without sounding insensitive, so I'll reiterate that I'm diagnosed with ASD and ADHD and know how difficult stuff can be for many of us.
But anyway… it's not so much how OP describes dealing with her DD, but how she interacts on this thread that makes me feel OP thinks autism acts as an effective trump card in real life, that will make other people accede to you and treat you as especially sensitive and delicate. They don't.
While we really need better adjustments and adaptations, and better attitudes to disability, I don't think we're ever going to live in a world where autistic people aren't going to have to learn to find ways to cope with things they find difficult, and accept that saying "I have autism" doesn't mean you will be automatically conceded the point. Like everyone else we have to learn how to exist in the world, and that includes at some point learning how to handle things like comments that unintentionally upset you (like the DD's dad's comment).
9 is probably a little young for that, but the way OP interacts on this thread makes me wonder how she's planning to help her DD exist in a world that doesn't generally assume that you're extra sensitive and need handling with kid gloves.