twitter.com/GrapheneOS/sta
Skipped version 27 because the Play Store doesn't allow us to delete an uploaded app bundle despite it not actually being published. Could add zero padding to versionCode like many apps are doing to accomodate point releases but would rather skip 27.
Quote Tweet
GrapheneOS Camera app version 28 released: github.com/GrapheneOS/Cam.
See the linked release notes for a summary of the improvements over the previous release and a link to the full changelog.