IANAL, however...
Google's behavior was ruled illegal because it was a violation of antitrust law, which limits things which a company with a large market share (meaning Google, in search) may do itself, to shut out competition.
Apple Inc is not the US Dept. of Justice, nor a Federal Judge, nor privy to Google's internal data and dealings, nor in the search engine business itself, to either make or enforce any official or expert determinations about what Google may legally do. Nor to conduct any investigations into such matters, nor to ...
(And the Feds had never ordered Apple to act on their behalf in such matters.)
In other news, Uber & Lyft will happily take your money to take you places...without looking into whether that might create a violation of any restraining order currently in effect for you. Or involve women who aren't your wife. Or cause you to miss mandated court appearances. Or whatever. And they won't get in any trouble for that, even if you're sent to jail for it.