On the LG device, the app icons/app icons can be easily changed via LG SmartWorld, without the need for root or other additional software. Icon packs can be downloaded/bought from the store, both free and paid.

Normally, only icons of the system/standard apps are exchanged. Apps installed from the Play Store are excluded from this. The one or other exception of well-known apps such as Facebook or WhatsApp are already available.

Android 9 | LG UX 9.0
Step 1:  Open the  Settings
Step 2:  Tap on  Display
Step 3:  Tap on  Wallpaper & theme
Step 4:  Tap on  Icon
Step 5:  Tap on desired  Icon
Step 6:  Tap on  Download
Step 7:  Tap on  Apply
  1. Open the Settings
  2. Tap on Display
  3. Tap on Wallpaper & theme
  4. Tap on Icon
  5. Tap on desired Icon
  6. Tap on Download
  7. Tap on Apply

LG Instructions