Source?
As far as I know, nearly all flagship phones, Apple or otherwise, get about 7 years of update support (except Pixel phones with GrapheneOS which get 14 ignore; I remembered this incorrectly).
The difference is, even my old phone running Android 8 (a 9yo OS) can still browse the web, run all apps, and perform fine as a phone. An even older phone running Android 4.4 can still run 3rd party apps. iPhones seem to stop working about a year after they stop receiving updates, and they don't support sideloading (also know as running the software you want to run on the device you own).