Android 16 QPR1 source code is nowhere to be found but Google swears it's coming
(www.androidauthority.com)
Google is usually pretty quick to upload source code to AOSP after release on Pixel.
replyAndroid 16 has been highly unusual though, with the only source code release done 3 months ago in June, when it was initially released.
https://android.googlesource.com/platform/frameworks/base/+r... - only two "16.0.0" hits here, both from June 10.