It is a non-sensical ruling. But IIRC the reason was basically that while Apple and Google did basically the same shit, only Google kept a written record of their monopolistic behaviour, so only Google was found guilty.

However, there is a relevant court case here. The one about Samsung's "Auto Blocker" (https://arstechnica.com/gadgets/2025/07/samsung-and-epic-gam...). Epic Games sued because Samsung made it too hard to install apps from "untrusted" sources. This may be a reason why Google is now trying to make the process more difficult on the developer side instead.