You cannot change it, you must setup ScreenTime and disable Siri WebSearch
May or may not be anonymized but if you click on Google stuff, its likely fair game. Not happy about this, I dont care about their default deals but they have no right to not allow your Siri searches to also respect your preference in search engine you’ve consciously decided on
Once again, very sneaky
Still better than non-degoogled android devices though
Doubt, I am not saying it is worse, but not better either.