No, there aren’t any settings that would expose account email addresses to normal users.
A lot of the time in corporate environments they’re integrating with an existing SSO system, so exposing public email addresses, phone numbers, etc is easy to do with custom fields… I imagine that covers most of the demand for this kind of thing.
While it doesn’t involve showing an email address, I recall multiple requests to allow normal users to PM staff even when other PMs are disabled, and there’s a defunct plugin that used to enable this: Kinder Guardian - let New members message Staff…