alt Hacker NewsTitle doesn't match the article, which is currently "Apple changes its rules for personalised advertising in apps".
Apple gave itself better dialogs for the permission prompts, which they will now equalize (perhaps just in the EU?) with the prompts they use for their own apps.
My understanding of ATTF is that first-party tracking needed no disclosure other than the information declared in the app's App Store privacy section about the information gathered. If you made a suite of 20 apps, you could track usage across all of them without issue, as long as you didn't also share that info with a third party.
Apple didn't give itself better dialogs. It never did third-party tracking across across apps or websites so the ATT prompt would never apply to their apps. It also voluntarily showed a dialog explicitly asking you to opt into personalized advertising. Facebook doesn't show anything similar when you use Instagram or the Facebook app, because that would be undoubtedly bad for business.
The German regulator settled because the facts are simply on Apple's side. Apple settled because at the end of the day it's no skin off their back if the EU now wants to weaken privacy protections to benefit ad-tech.
EDIT: You can downvote me all you like, but it's right there on page 1 of the FAQ from the regulator. https://www.bundeskartellamt.de/SharedDocs/Publikation/EN/Pr...