Thanks to the Galaxy Store, Samsung's One Ui offers the possibility to exchange App-Icons in an uncomplicated way. after the successful download of the Icon-Packs from the Galaxy Store, they can be activated next to the standard icons. no root rights or additional apps are required for this. in the Samsung Galaxy Store, there is a wide selection of free as well as paid App-Icons.

Android 10 (One UI 2.0)
Step 1:  Open the  Settings
Step 2:  Tap on  Themes
Step 3:  Open the  menu
Step 4:  Tap on  My stuff
Step 5:  Tap on  Icons
Step 6:  Choose desired  App-Icons
Step 7:  Tap on  Apply
Step 8:  Confirm with  Apply
  1. Open the Settings
  2. Tap on Themes
  3. Open the menu
  4. Tap on My stuff
  5. Tap on Icons
  6. Choose desired App-Icons
  7. Tap on Apply
  8. Confirm with Apply

Samsung Instructions