On another website, someone said "If Cisco can remember the timeline where he found out Wells was the Reverse Flash, might Iris also start remembering things from that timeline...like the fact Barry revealed himself as the Flash to her?"
I'd never even thought of that.
It's an interesting question.
Iris isn't remembering the other timeline at least not yet, however events for her in the other timeline were not as traumatic as Cisco's.
However she did remember how she touched Barry's hand when he was in a coma and got a small electric shock. She tried to touch Flash's hand tonight and received the same shock. She knows now.