Hey, congrats on the UCLA interview! To answer your question: I think you should wait to email. Last year when I interviewed at UCLA, I received the invite from my POI on Jan. 8th and then received an email from the faculty member organizing the interviews on Jan. 15th. I don't know how they're organizing things this year (didn't re-apply), but if I were you, I'd wait at least a couple more days before reaching out to anyone. Hope this helps!
Still can't believe it!! ?
School: Duke University
Type: PhD
Date of invite: 5 January 2021
Type of invite: Email from graduate program director.
Interview date(s): Feb. 4th and/or 5th