The latest release of GrapheneOS is significant because it now has official support for using RCS in Google Messages. This is to try and address the ongoing RCS disconnect users on both stock and non-stock Android have been experiencing worldwide.
Some technical analysis of the disconnect can be found in later messages in this long-term RCS thread:
Some technical analysis of the disconnect can be found in later messages in this long-term RCS thread:
https://discuss.grapheneos.org/d/1353-using-rcs-with-google-...