It's not? The iPhone App library has a TERRIBLE UX with its mandatory (and confusing) grouping. The Windows 11 Start Menu grid is fine just the way it is, but I guess now there is a category mode for people who like to hide their apps.
It's closer to Android which has no grouping. Besides, Apple only did the library once they realized Android's approach of customizable home screens + library was superior to forcing every app to be on your home screens.
Both of which ripped off the Desktop, which goes back to what, the Xerox computing days?