On the Samsung device, individual ringtones can be set for individual contact groups. For example, if a contact in this group calls, the group ringtone will sound.

Even if a ring tone is set for the group, the ring tone of a contact is preferred.

Android 10 (One UI 2.0)
Step 1:  Open the  Contacts -App
Step 2:  Open the  menu
Step 3:  Tap on  Groups
Step 4:  Tap on desired  Group
Step 5:  Tap on  Edit
Step 6:  Tap on  Group ringtone
Step 7:  Choose desired  Ringtone
Step 8:  Tap on  Back
Step 9:  Confirm with  Save
  1. Open the Contacts-App
  2. Open the menu
  3. Tap on Groups
  4. Tap on desired Group
  5. Tap on Edit
  6. Tap on Group ringtone
  7. Choose desired Ringtone
  8. Tap on Back
  9. Confirm with Save

Samsung Instructions