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There is no screening and most of us probably already carry autism related hereditary factors. As the "cause" is uncertain, most suggestions are just that. So, there cannot be scientific recommendations yet. FYI Elon and Mark Zuck both have Asperger's, a part of autism spectrum.

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You can easily Google this and find that there is no genetic test for autism. There are other genetic diseases that tend to also cause autism, but most autistic people don't have any known genetic reason.

Since you are worried that you may have autism, please don't donate sperm just to get a free genetic screening. Autism is diagnosed from a neuropsychiatric exam.

If you are interested in a free genetic screening, volunteer for the NIH's All Of Us research project. https://allofus.nih.gov/

Autism is defined on the basis of behaviour rather than genetics. Since the autism spectrum is rather large there isn't a single genetic offset which can be defined as a cause. There is however ( in the Netherlands ) the availability of WES which can be asked to focus on all known factors contributing to developmental delay (which might occur with autism, note that this is certainly not always the case)

Autism is diagnosed through a series of cognitive and behavioural exams. There is no genetic test for it.

Links between genetics and various ASDs are still only being understood and it appears to be more complex than simple genetics. In utero conditions and environmental factors may play a part.

So even if/when there's a genetic test it would be merely a probability indicator rather than a dead certainty.

If you believe you may be autistic, you must talk to a proper psychologist. There's no shortcut/free test.

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"Autism" is a diagnosis reached through a battery of tests administered by professionals. The diagnosis encompasses the presentation of a range of cognitive and behavioral symptoms. However the underlying causes of this presentation can be quite varied, ranging from the inheritance of specific genetic alleles, chromosomal events, probably epigenetic factors, brain injury and who knows how many other non genetic developmental factors.

I do not believe that there are firm stats, but only a small fraction of cases can be ascribed to a specific cause.

Autism isn’t a genetic disease, it’s increasingly looking like a natural possible expression of the human genome. All populations have autistic people, I hate to think what would happen to a society of just “neurotypical” mimics.