No Apple is not capturing most of the revenue from App Store. Their services revenue which is App Store + iCloud + Apple Music is their second biggest revenue stream I think after iPhone. But it still dwarfs in front of iPhone. Though services revenue is growing a lot faster.
You didn't even read what I said or the link I posted. I'm comparing Apple to Android and their respective app store revenues, which is what the original comment was about. I never said Apple received most of their revenue from the app store.
https://techcrunch.com/2018/07/16/apples-app-store-revenue-n...
And this is despite, like you said, the install base of Android being much larger.