Nothing OS is a custom OS by Nothing Technology Limited built on Android. It is not privacy focused like you would get with GrapheneOS but has very little bloat. It is proprietary to Nothing phones. There are unofficial versions of /e/OS available on on XDA for the CMF Phone 1. The Fairphone 4 also has the ability to run custom ROMS like /e/OS and LineageOS.
Nothing OS is a custom OS by Nothing Technology Limited built on Android. It is not privacy focused like you would get with GrapheneOS but has very little bloat. It is proprietary to Nothing phones. There are unofficial versions of /e/OS available on on XDA for the CMF Phone 1. The Fairphone 4 also has the ability to run custom ROMS like /e/OS and LineageOS.
Here is a video talking about putting /e/OS on the CMF Phone 1: https://youtu.be/TkTzmM9izCo