There was a brief discussion about GrapheneOS on the Qubes OS Forum, starting from this post:
The very last post basically sums up my position on the matter:
Related:
While I was waiting roughly four years for my Librem 5, I found what appears to be the best solution yet, when it comes to having both privacy and a lot of good apps on the same device. This solution appears at first to be counter-intuitive. But it appears to be working very well for me.
1.) Buy a Google Pixil phone directly from Google. If you buy it from your phone carrier, this won’t work. I bought a Pixil 6 Pro directly from Google.
Directly giving your money to Google is exactly the most privacy-erroding consumer action you can be doing at any given point in time.