The group who organized this should never have brought in a straight person to educated on the lived experiences of LGBTQ+ people. And a true LGBTQ+ ally, as this person claims to be, would never, ever accept such a speaking gig. Nor use it to plug her (paid) services, literally profiting off of the pain of LGBTQ+ people.
A true ally would say, “Thanks, but this work is already being done by LGBTQ+ folks. Here are some who could speak on this topic.”