Sony’s AOSP on Xperia Open Devices page: https://developer.sony.com/open-source/aosp-on-xperia-open-devices
With the recent activity around Google restricting sideloading and not releasing device trees for Pixel, this is a possible alternative. I haven’t tried it, but intend to switch to a Sony device for my next phone.
That’s curious, I wonder why? I’ll include the official Sony page on it in the post too.
Tongue in cheek probably because Sony shipped rootkits on their music CDs