The appeal doesn't list any details as to why Epic is filing it, only that it's appealing the final decisions of the case to a higher court. It's clear, however, that Epic didn't get nearly everything it wanted, so this appeal was expected.
https://www.techspot.com/news/91222-epic-promised-appeals-ruling-court-case-apple.html?utm_source=dlvr.it&utm_medium=blogger
https://www.techspot.com/news/91222-epic-promised-appeals-ruling-court-case-apple.html?utm_source=dlvr.it&utm_medium=blogger