Hi @EricaTeitelbaum There are actually two chat windows in Teams Live Events: one for the producer to communicate with the presenter, and the meeting chat for audience members to submit questions and/or the producer to transmit one-way communications out to the audience.
The audience Q&A chat window has to be set up when the organizer schedules the live event, so perhaps that box wasn't checked before your meetings started.
Participate in a Q&A in a live event in Teams - Office Support (microsoft.com)
