As I understand it (from my non-legal casual read of the new coverage). Having a monopoly isn’t illegal, abusing it is. For Google they found that google was secretly paying companies to not put their apps on other stores. That was what they got the judgement against them. They didn’t find anything like that for Apple.
The page says it captures game audio only by default. But you can switch it to all audio if UPI want to capture something like external voice chat.