This case only concerns Apple's App Store fees before 2020; it was a blanket 30% charge for paid apps until they introduced those changes following the whole Epic Games legal saga etc.
Apple are not paying a penalty for anything after 2020 when the new rules allowing those with lower turnover to pay 15% came into effect etc.
> It’s only a fraction of a fraction of a fraction of a fraction that need to pay 30%
During the first 12 years of the App Store, everyone paid 30%.