The GrapheneOS team has already absolutely dismanteled the Fairphone on Mastodon:
Fairphone is an insecure device with substantially delayed privacy and security patches. It receives the Android Security Bulletin patches consistently 1 to 2 months late and receives the recommended patches years late. It has a broken, insecure verified boot implementation. They have also misled their users about support by claiming their devices will get 6 years of support when they can only provide 2-3 years of security patches. That is not a privacy first device at all.