Support for TeslaUnread was officially removed from Nova Launcher starting with version 7.0 in 2021. Installation Notes
Automatically darkens the search bar, app drawer, and desktop folders based on local sunrise/sunset or a custom schedule. NovaLauncher4.3.1 Final Unread5.0.6.zip
To use the unread badges, Nova Launcher Prime (the paid license) is typically required to unlock the "Unread Counts" menu in settings. Support for TeslaUnread was officially removed from Nova
These specific legacy versions can still be found on archival sites like APKMirror . 0 features? while TeslaUnread 5.0.6 requires Android 4.4+.
Nova Launcher updated to 4.3 with N Dev Preview 2 folder icon
Nova 4.3.1 requires Android 4.1+, while TeslaUnread 5.0.6 requires Android 4.4+.