To add shortcuts for features to Home screens, you may need to first allow the "Create Home Screen Shortcuts" permission for the South app. Below are methods for some common operating systems for your reference, while the actual operation on your phone might be slightly different.
Huawei EMUI 11
Enter Settings > Apps > Permission manager > Search for South and tap it > VIEW ALL PERMISSIONS > Find Create homescreen shortcuts (under OTHER) and enable it
Honor MagicUI 4
Enter Settings > Apps > Permission manager > Create homescreen shortcuts > Search for South and enable the permission
Xiaomi MIUI 12
Enter Settings > Apps > Permissions > Permissions > Search for South and tap it > Find Home screen shortcuts and tap it > Select Always allow
vivo OriginOS
Enter Settings > Apps & permissions > Permission management > Find South on the list and tap it > Permissions > All permissions > Enable Desktop shortcuts
