the user interface is largely responsible for the appearance. on Samsung's devices, the One UI user interface is used. in addition to this start app (launcher), we can install many other launchers from the Play Store. in order for it to be displayed on the Samsung device, the desired start app must be set as the default.

Android 10 (One UI 2.0)
Step 1:  Open the  Settings
Step 2:  Tap on  Apps
Step 3:  Open the  menu
Step 4:  Tap on  Default apps
Step 5:  Tap on  Home app
Step 6:  Choose desired  System Launcher
  1. Open the Settings
  2. Tap on Apps
  3. Open the menu
  4. Tap on Default apps
  5. Tap on Home app
  6. Choose desired System Launcher

Samsung Instructions