datadump Note that you won't really get GrapheneOS if you build it yourself on a device that isn't officially supported, because you'll lack all the security and privacy bolstering at hardware level for the OS to even be named “GrapheneOS”, you simply wouldn't be able to benefit from all the features GrapheneOS offers.
The reason you can build it on an unsupported device is that the code is open and MPL-licensed, companies are allowed to reuse the code, make it proprietary and sell devices with their own versions of GrapheneOS, but they have to sell it under another name because GrapheneOS is a trademark and that it's not GrapheneOS anymore.