Galaxy Z Flip 3 Cover Screen – Big Problem Solved! - YouTube
How to use Galaxy S21 Smart Clear View Cover (S-View Flip Cover)? - Samsung Galaxy S21 Guides
Themes / Apps / Mods - CoverScreen OS - more than a cover launcher, use cover screen as a fully functional mini phone! (includes Native Lockscreen!) | XDA Forums
This Galaxy Z Flip 3 launcher will make you use your main screen less often | Android Central