Per one tech forum this week: “Google has quietly installed an app on all Android devices called ‘Android System SafetyCore’. It claims to be a ‘security’ application, but whilst running in the background, it collects call logs, contacts, location, your microphone, and much more making this application ‘spyware’ and a HUGE privacy concern. It is strongly advised to uninstall this program if you can. To do this, navigate to 'Settings’ > 'Apps’, then delete the application.”
And what exactly does that have to do with GrapheneOS?
Have you even read the article you posted? It mentions these posts by GrapheneOS
Please, read the links. They are the security and privacy experts when it comes to Android. That’s their explanation of what this Android System SafetyCore actually is.