By default email addresses are private, and can be seen only by the participants themselves and workspace admins in the users' profile. Participants cannot see each other's emails by default.
Admins can choose to display all email addresses so that participants can see each other's email addresses. The address of a user will be displayed in their profile. Admins will always be able to see all email addresses.
How to make email addresses private:
Action menu > User management
Edit profile fields and organization -button
Users' email visibility > Edit
Choose whether the email addresses are Public or Private (Public = visible to all participants and admins, Private = visible to only admins and the user themself)