[closeneough]

This project is about reverse engineering the firmware blobs. It states that they do not want to create a distribution like postmarketOS or other projects do.

[fsflover]

The listed distributions have already been created. The OP didn't suggest to create a distribution but to collaborate with existing ones not relying on the Google's OS.

[pessimizer]

Graphene and Lineage both rely on Google's OS, so this is not what the OP was saying.