By default we do not have a specific setting that will prevent users to edit their Nicknames. You can use the CSS code below to achieve this on your site in a mobile view. 

1. Go to BuddyBoss > Theme Options

2. Under Custom Codes, enable CSS

3. Append the following:

@media (max-width: 768px) {

#profile-edit-form .field_nickname input { pointer-events: none; }

}

4. Save changes.

Note: Any modifications are considered custom work already. Know more about our Support policy here: https://www.buddyboss.com/support-policy/

With the code:

Without the code: