GrapheneOSGrapheneOS started in 2014 and was originally named CopperheadOS. In late 2015, the Copperhead company was founded which was meant to support the project. Copperhead didn't create CopperheadOS and didn't own or control it. Copperhead made a failed takeover attempt on it in 2018.
Hyper
Xtreix@HyperCommander @GrapheneOS Samsung does not allow the installation and use of any operating system other than the original one on these devices. If you do so, it will blow a fuse (e-fuse) that disables security features, voids the warranty, and renders the phone unusable even if you revert to the original OS.
GrapheneOS will never be available for Samsung devices as long as Samsung maintains this policy.