Its a fork of lineage using microG and does not have the security of graphene.
Discussion
Security of GrapheneOS means being patronized by a mentally unstable person who behaves like some diva.
GrapheneOS forces people to connect to their servers to keep clock accurate. Nowadays you cannot rely on manuall clock setting.
Do you use your computer with disabled administrator power because some autistic dev said so? You don't trust government but you agree that an individual treats you like a child.
Srsly? I can has link?