I am not convinced it's "SEO" or plenty of other small companies with perfect SEO would be similarly high.
Over the years Google has gotten especially questionable in various content it recommends, and as an opposite, hiding wikipedia from results unless specifically adding wiki.
App makers should not be allowed to collect data. Only Apple should be allowed to. And Apple should be opaque about it while running contradictory advertising about privacy and security.
Btw is it gaslighting when Apple claims privacy but gives your information away to organizations like the US and Chinese government?