And let's not even get started on the LTE radio baseband firmware (Qualcomm etc), which is a totally opaque thing. The radio itself has its own operating system, firmware, it's a magic black box as far as anyone is concerned.
The parts that people care about, like cloud are not in the user's control. If you want your own cloud file sharing then there are apps for Nextcloud, and even an open source AppStore called F-Droid that has the open source apps. Google Drive offers E2E as well, and these announcements are nothing but lip service to something that is already being offered elsewhere to give something for Apple cultist to feel good about.