As you can see from above I saw it shared on the f-droid forums and it seems quite interesting.
Not everybody has a pixel device to run grapheneOS on and this ROM seems to aim for a wider range of supported devices.
It’s a fork of lineageOS with loads of addons and customizations.
I am in no way related to his / her work.
I thought it might be helpful to point out this project exists and perhaps it could be listed?
I haven’t tested it yet. I plan to try it out on my oneplus6.
Some more links.