Why would China allow the domestic sale of a device that could run GrapheneOS?
Historically, some very large Android OEMs based in China and selling in China also provided bootloader unlocking support in their devices including Xiaomi https://github.com/zenfyrdev/bootloader-unlock-wall-of-shame... and Oppo https://github.com/zenfyrdev/bootloader-unlock-wall-of-shame...
It doesn't have anything directly to do with GrapheneOS, and would have enabled custom OS support of any Android distribution.
Why not?
Historically, some very large Android OEMs based in China and selling in China also provided bootloader unlocking support in their devices including Xiaomi https://github.com/zenfyrdev/bootloader-unlock-wall-of-shame... and Oppo https://github.com/zenfyrdev/bootloader-unlock-wall-of-shame...
It doesn't have anything directly to do with GrapheneOS, and would have enabled custom OS support of any Android distribution.