Unique ringtones can be composed not only for Favourites but also for all saved contacts or even for all calls.

Note: To change this setting, the contact ringtone function must be enabled.

Android 9 | LG UX 9.0
Step 1:  Open the  Settings
Step 2:  Tap on  Sound
Step 3:  Tap on  Ringtone ID
Step 4:  Tap on  Compose ringtones for
Step 5:  Choose between  All incoming calls ,  Contacts only  and  Favorites only
  1. Open the Settings
  2. Tap on Sound
  3. Tap on Ringtone ID
  4. Tap on Compose ringtones for
  5. Choose between All incoming callsContacts only and Favorites only

LG Instructions