Quite surprised about ID4 numbers. Ours in the shop a few times per year, and we often crack jokes about it with other owners.
So it's quite possible that both are true: Maybe ID4 has lots of non-safety and non-environment problems, so it is in the shop very often, but still rarely fails an official inspection.
None of other owners I spoke to were particularly happy with theirs either.
(I drive a Skoda Enyaq, so no particular shade meant towards the VW-group)
(It's charging on the parking lot right now, unlocked because central lock has failed)
I have no idea what German auto shops do, but whenever I take my car in to a shop in the US for service (routine or otherwise) they generally include various inspections and adjustments to various things, including things that Google is telling me are part of the TÜV inspection.