Hi there,

The only options available for avatar integration is in the following setting.
Settings>Layout>Users>Profile Picture Integration

Hi Raymond!

Basically I need to add an avatar feature for users. How can this be implemented? Thanks

Not sure what you mean here. Are you asking for the steps to implement this feature as a developer?

Yes. Interested how do avatars work on this site?

We do not provide guides to implement features as it is out of our support scope. The most I can provide are these paths, where you can take a look at how other avatar integrations are done.
JoomlaFolder/administrator/components/com_komento/includes/profiles/profiles.php
JoomlaFolder/administrator/components/com_komento/includes/profiles/adapters/