My T has mentioned me in supervision a few times that she has told me about.
The first time i heard about it was when i had had a really hard session, and told my T that i thought i was texting/calling her too much between session. My T said that she had run it past her superviser, who said it was "very appropriate considering the level of deep emotional work" that we were doing at the time.

I felt it was very helpful that someone outside of the therapy room (the supervisor) acknowledged how deeply i was effected by what i was going through, and found it a helpful thing.