Unless something has changed generally only an Admin & maybe full site mod(if a setting is changed) can view a member’s email address.
However unless changed there was a bit of loophole for full site moderators viewing Log file. Iirc this was typically more exposed(email address) during a user deletion/anonymized user. The log contained the email address.
TL4 cannot view user account details typically unless there is a setting to expose that.
I as admin have had to figure out a clever method of unanomize a user or 2 when a Mod took an unsanctioned action against a member on a site I volunteer admin on. Not perfect to restore but is in part doable.