And Lae’zel was definirely part of a mission to recover the artifact (for Orpheus - they definitely don’t know about the emperor) and got captured, she wasn’t just hunting mindflayers
But when you ask her either about the Prism or the dragon riders she has no idea what they are about. She thinks they are just hunting the Nautiloid. She knows that there are Githyanki symbols on the Prism but that’s it.