The improvement to autowipers is tied to the FSD Beta stack, as explained on May 29, 2023:
[snip]
Coincidently, I installed
FSD Beta v11.4.3 last week, and
autowipers are
remarkably improved: As I was sitting at a red light after a sun-set drive thru the river parks area, my windshield was dirty and bug splattered. Without prompting, the car started spraying windshield washer fluid and the wipers turned on. Not only that, but it continued with a changing pattern of intermittent washer fluid squirts with variable wiper speed until the windshield was completely clean. No $2 wash by a squeegee-boy could have done better. I was gob-smacked.