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.
It certainly can be a bit involved. When I moved from Gmail address to my own personal domain I did it slowly over a few months.
I set my Gmail address to automatically forward to my new email address. Then I setup a quick filter which added a label on everything that had been forwarded. Once a week or so I would look at all the emails that had been forwarded and update them to my new email (or delete them if unwanted).
You might get something harder after that. But there’s a reason one of the most common code interview questions is FizzBuzz. There’s a shocking number of applicants that can’t do it.
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.