Pixel C
Install Android 10 on Google Pixel 2 XL (LineageOS 17) – How to Guide!
Install Android 10 on Pixel C (LineageOS 17) – How to Guide!
Finally, Android 10 Q is official and so the AOSP 10 Source code.
Upgrade Guide for Smartphones
Finally, Android 10 Q is official and so the AOSP 10 Source code.