10% was not commission-free. App Store commissions are between 15% and 30% depending on the size of the developer. That would be between $165B and $330B revenue for Apple from commissions.
Nobody knows how profitable the App Store is to Apple. "It’s a question that investors would love to know the answer to, because it addresses the entire business model of the App Store. Apple does not disclose any detailed financial results of the App Store,". "Barnes calculated that the App Store had hefty profit margins, which increased to 78% in 2019, up from 75% in 2018" [2]
App Store revenue is still growing (not least with inflation) so the number of 2023 was likely even higher.
~80% margin on $165-$330B revenue in 2022 would be $132-$264B. So my original number of $100B may actually have been on the low side.
[1] https://techcrunch.com/2023/05/31/apple-touts-1-1-trillion-i...
[2] https://www.marketwatch.com/story/how-profitable-is-apples-a...