Regardless of flat earth "validation" reasoning that impermeates self-report survey data, the fact is that sound scientific principle disallows any conclusions from such data but only correlation, leading to better-honed questions only
and zero chance of answering said questions without further scientific
like it or not. Any "conclusion" you may draw exceeds the study's summary and ring true in your own head solely on your faith in psuedoscience.
The first hypothesis I'd form from such data, which simply cannot be answered within the four corners of a self-report study alone, is that the responders who are self-admittedly autistic already are marginalized from the mainstream and therefore more free to answer freely, while thoss who are not autistic, undiagnosed autistic, or in denial regarding being autistic are still striving to be mainstream and therefore avoid answering honestly regarding non-heterosexuality should they be experiencing it
This hypothesis is of course only hypothesis but like any other that could be framed by a self-report study, simply cannot be scientifically eliminated as possibly true without designing an experiment, performing same and if meaningful results are produced, those results would need to be validated by independent researchers before becoming scientific conclusions.
If you are who i think you are, i am weary of confronting your religious ferver regarding the use of circular mathematics and other sophistry to circumvent the defined scientific process to create false facts that fit false narratives.
If you want to believe "truths" then drop the psuedointellectual bullshit and just admit your faith in what you believe. Its simpler and more valid than pretending "science" can be performed entirely by sophistry combined with a bunch of people answering surveys about themselves.