That's... actually right. Not sure how I messed it up. In that case, I also retract what I said about their Dutch revenue--it seems way less likely to be true at that percentage.
You were basically correct, you just got lost track of the units you were using, we've all been there! $56.7 million per week, annualized for a whole year, comes to $2,948,400,000, which is almost exactly 0.8% of Apple's 2021 revenue of $365B. (Of course, the 50 million fine isn't weekly, but the total max fine.)
I'm not so sure. We're a 17.5 million people country and iOS has a 40% marketshare according to figures from last January.
If we round up that's 7 million iPhones, might be some more tablets but I'd guess negligible. A max of 50 million euros in fines will definitely be a substantial amount of their App Store income.