They themselves said it was trained on NVIDIA chips, so I’m not sure where you got that it wasn’t. It was trained on the less capable versions sold for the Chinese market.
Why do you think there's a longer interval between inspections for Teslas? The interval for Hauptuntersuchung in Germany (which this article is about) is 2 years (except for the first one which happens after 3 years), regardless of car brand.
And a windshield wiper needing replacement wouldn't count as a "significant fault" that they force you to come back for before getting certified.