Comment by strcat

GrapheneOS provides a lot of features not available in LineageOS. Our focus for is privacy, security and replacing Google apps/services. The features we add aren't only privacy and security features. We provide our own network location and geocoding support. Local text-to-speech and speech-to-text are being developed. It also provides a bunch of assorted features such as forcing the availability of VoLTE, VoNR, VoWiFi and 5G.

https://grapheneos.org/features is an overview of what's provided compared to AOSP but doesn't cover everything yet, especially recent additions.