Read https://grapheneos.org/faq#supported-devices
We can only support devices that properly provide the necessary standard of hardware, the regular firmware updates for it, and provide complete support for alternate OSes. (Flashing, locking the bootloader, verified boot, and able to take full advantage of the hardware.)
Not to forget that while GrapheneOS provides a default position of no privileged access for Google Services. This is not the focus or scope of the project as a whole. We simply give users the choice to use them or not properly sandboxed and isolated as any normal unrpivleged app. Therefore use of their hardware (which is the baseline standard) by the project is not antithetical to it.
