Yes but open source development for Android is made harder and harder every year by google, just look at the ongoing sideloading discussion. A working real Linux based OS for phones would be the holy grail. LineageOS is great and I am using it, but for real privacy you need a lot more.
I am well aware where LineageOS stands against Linux. But my point still stands - LineageOS has no focus on privacy and AOSP is under threat, again.
LineageOS without “Google junk” is useless for 95% of the userbase, as they miss out very basic features Google outsourced of AOSP, such as Network Location Provider, Push Notifications or even an app store. I am not even talking about Play Integrity.
Not true, see Play Services