The European Commission is going through Apple’s OSes feature by feature, with the help of interested parties and industry collaboration, and deciding where the API lines should be drawn. It’s absolutely fascinating.
And remember, Apple brought all of this on itself through its years of misconduct and inability to follow the law.
Don't miss the 30 pages of proposed specs in the PDFs here (summarized in screenshots here; no alt-text, follow through to original link): https://digital-markets-act.ec.europa.eu/dma100203-consultation-proposed-measures-interoperability-between-apples-ios-operating-system-and_en
How granular is this stuff?
"If Apple presents end users of [3rd-party apps] with a choice regarding the level of background execution capabilities or background connection to a connected physical device, it must present the same choice in the same manner, including regarding time, place, and cadence, to end users of Apple’s connected physical devices. Apple may only present end users with a specific choice […] if Apple implements and offers this choice for its own connected physical device.”