This has been true for many. many iOS releases. The good apps that become essential eventually get built into the operating system. This happened with sleep trackers, menstruation trackers, numerous other HealthKit apps, SwiftKey/Skype, Tile (the AirTag-like thing), camera features borrowed from the best third party camera apps, the list goes on and on.
Building for iOS is a great way to show Apple that there's a market for something :)
Building for iOS is a great way to show Apple that there's a market for something :)