I can think of a few things leading to Voight-Kampff-style polygraph tests being phased out in this timeline
1. Several U.S. states have banned reliance on polygraph test results by employers. "Polygraph" on Wikipedia lists Rhode Island, Massachusetts, Maryland, New Jersey, Oregon, Delaware and Iowa. In addition, the federal Employee Polygraph Protection Act 1998 generally bans polygraphing by employers outside the rent-a-cop industry.
2. Autism advocacy organizations raised a stink about false positive results on autistic or otherwise neurodivergent human beings.
3. The LLM training set probably picked up answers from someone's cheat sheet, such as "The turtle was dragging its hind leg, and I was waiting for it to stop squirming so I could see if it needed to go to the vet."