Ive never dated anyone whos been diagnosed with anything, but I am certainly attracted to quirky people. The last long term relationship was a bit of a train wreck, and I suspect there was some autism there, but she was only ever diagnosed with anxiety, although her cousin, who her family said was just like her, was eventually diagnosed as autistic. We had very different levels of emotional maturity though and that caused a lot of problems, especially around conflict resolution. I suspect she had a personality disorder in tow.
I think you should just assess each person individually and not really screen for divergence. Most people arent going to open with 'hi im autistic' anyway, and you could end up doing yourself a disservice worrying about if they fit with you on paper verses just finding out if you fit together organically.