So in this guide i'll show you how you can change your default Phoenix os Launcher or convert Phoenix OS Desktop mode into tablet mode.
[ Step 1 : Download you launcher ]
> Find & download the apk of your launcher from apkmirror website.
> i recommend to use Shade Launcher it's very clean consume less memory.
[ Step 2 : Installation ]
> Make a folder in "#/system/app" directory with a a Name like "ShadeLauncher"
> Copy the launcher apk to the folder & rename it to "sl.apk"
[ Step 3 : Remove CZ file manger ]
> Goto "#/system/app" using fx file manager & delete folder with the name "FileManager"
[ Step 4 : Reboot ]
> Now just reboot your system to apply your launcher.
[ Bonus Tip ]
> To change your Launcher on old Darkmatter build just copy you launcher apk in the "#/system/app/RL" directory.