mumbai All of the messages here indicating the stability or instability of the newest release are on the Alpha Release Channel.
When a release is announced by the GrapheneOS account it means that it has been sent to the Alpha Release channel and NO other announcements will be made when it moves forward through the release channels. This is THE announcement of the release.
Those who have opted-in to the Alpha Release channel on their phone will get the update. Once Alpha is cleared to be ok, then it goes out to the Beta Release channel. Again, those who have opted-in to the Beta release channel on their phone will get the update. Once Beta has cleared to be ok, then it goes out to the Stable Release channel that is the default Release channel at GrapheneOS install. If for whatever reason a release has to be pulled from Alpha or Beta, then a new release is announced in place of it and the process starts all over again until it reaches Stable.
You can change what release channel you are on by going into Settings >> System >> System Update >> Release channel. Generally, you don't want to change from the default Stable Release channel. Alpha is not a daily driver release for most people because, as reported here there seems to be an issue on certain devices with this release. Beta can be for the most part safe, especially if it fixes very rare nasty bugs found in a previous Stable or Google changed something with RCS that broke it again but the general consensus is to just wait for it to come to Stable.
I am NOT a GrapheneOS dev, I don't speak for them and am providing information as I understand and perceive it.