EDIT : Alright V4 seems like a pretty good fit.
I printed it in PLA, using a modifier in Prusaslicer to remove the top and bottom layer in the back and leave only gyroid infill, it gives the case a bit more flex and saves on print time. Pictures included.

EDIT : Uploaded a V3
EDIT : Uploaded a V2
A basic case for the Pixel 6 (not pro)

Based off of this Pixel 6 model by BlazeCall00 :
https://www.thingiverse.com/thing:5019603

I made this quickly, I'm waiting on a better case to come out.
The fit is not perfect but it works in a pinch.
Use at your own risk.