It looks like moderators don’t get the button to show one particular user’s email when viewing the admin user page for that user. It’s there for admins, just not moderators.
It’s weird because they can still go to the list of all users, and click “Show Emails” there. But that button exposes emails for everyone on the list - we would prefer to use the single-user workflow when possible, because that limits PII exposure, and also because the logs are then clearer (since they reference the specific user whose email was seen).