The LG smartphone offers like most of all Android devices the emergency function, where you don't have to unlock the device first and then search for the corresponding contact.

If emergency contacts are added to the LG device, they will be displayed in the lock screen under "Emergency Call" and you can call these contacts directly without having to unlock the device first.

Android 9 | LG UX 9.0
Emergency contacts -  Open the  Contacts -App
Emergency contacts -  Wipe down
Emergency contacts -  Tap on  Emergency info
Emergency contacts -  Tap on  Add
Emergency contacts -  Select all desired  Contacts
Emergency contacts -  Tap on  Add
  1. Open the Contacts-App
  2. Wipe down
  3. Tap on Emergency info
  4. Tap on Add
  5. Select all desired Contacts
  6. Tap on Add

LG Instructions