What's the relevance to this thread?
GrapheneOS is a hardened OS substantially improving privacy and security along with providing very broad app compatibility via the sandboxed Google Play compatibility layer.
CalyxOS is none of those things and doesn't provide their users with standard security patches for months at a time. It rolls back rather than improving security beyond that too.
GrapheneOS and CalyxOS are dramatically different kinds of projects. CalyxOS has much more in common with LineageOS.