They had this on their homepage, advertizing QKSMS and Bromite as if they were project apps. Which they are not.
So either A: they preinstall apps as system apps or B: they have some form of installer that installs them as normal user apps.
You should have as many apps as user apps as possible.
Maybe they changes this idk. But QKSMS is not a simple SMS app like the one that GrapheneOS implements (the old and hardly maintained AOSP one) and Bromite is an unmaintained Browser which is a huge problem. Cromite and Quik are maintained forks.
Microsoft Just Released MS-DOS Source Code! (github.com)
Pixel 8a gets more expensive: Colors, prices, memory of the new Google phone (winfuture.de)