That’s your opinion, the law disagrees with you what a market is.
As you can find in the ruling.
Before being able to establish any abuse, ACM first needs to determine whether Apple has a dominant position and, as such, has the thereto-related special responsibilities.
9. For the assessment, it is important to answer the question of whether dating-app providers have any substitutes for Apple’s appstore service. The answer to that question is that such substitutes do not exist to a sufficient degree. As a result, Apple is, to a high degree, able to act independently from dating-app providers.
10. In its assessment, ACM took into account that most Dutch only have access to one mobile operating system with that system’s appstore (single-homing): Apple’s operating system iOS with the App Store or Google’s operating system Android with the Google Play Store. In order to widen the reach of the dating app, app providers must be present in both the App Store and the Google Play Store (multi-homing).
11. Multi-homing is critical to dating-app providers, because dating apps heavily rely on network effects: the greater the odds of a successful match are, the more appealing it becomes to use the app. Consumers that use dating services assume that the reach of their dating app is not limited to the mobile operating system on which the app has been downloaded. Dating-app providers are therefore forced, even more so than the average app provider, to be present in the both the App Store and the Google Play Store.
12. Apple does not allow alternative appstores on its smart mobile devices. Websites (mobile and desktop), too, are not alternatives for dating-app providers because, on those channels, the same functionalities cannot be offered as within an app.
13. That is why ACM establishes that Apple enjoys a dominant position on the relevant market for appstore services on the mobile operating system iOS for dating-app providers. On this market, Apple is, to a high degree, able to act independently from dating-app providers, and to dictate the
conditions regarding access to the App Store. After all, dating-app providers have no realistic alternative to the App Store, and consumers do not take into consideration the conditions for dating-app providers when selecting a smart mobile device.
14. Having a dominant position is not illegal in and of itself. Abusing one, however, is. Apple’s dominant position means that Apple bears a special responsibility for preventing such abuse. This special responsibility sets limits to its freedom of action with regard to the conditions it uses vis-à-vis dating-app providers. Apple must weigh the effects of its conduct on its buyers against the objectives that it pursues with that conduct.
And you can read the whole ruling at ACM