According to Apple, the App Store is not a monopoly thanks to web browsers
When discussing how a browser can compete with the App Store, Apple said, “Web browsers are used not only as a sales portal but also as platforms themselves, hosting” progressive web applications “(PWAs) that eliminate the need to download a Developer app through the App Store (or otherwise). PWAs are increasingly available for and through mobile browsers and devices, including iOS. PWAs are apps that have been created using popular web technology such as HTML 5, but have the look and feel and functionality of a native app. You can even have an app icon on the device’s home screen. Web apps are becoming increasingly popular. Companies like Amazon, Google, Starbucks, Pinterest, Uber, and the FT use web apps. Amazon, for example, just has launched its mobile Guna game service as a web app.2 Microsoft and Google are also launching gaming apps for iOS via web apps.3 The developer of the Telegram messaging app recently announced declares that work will be carried out on it. I web app for iOS devices. “
While Android users are allowed to download apps from the site, the Google Play Store is still being checked by the ACCC for the amount and type of data that the platform collects from users.