Atraveller
Banned
Well the squad did know but it was very late in the mission. After Deadshot speed-read that classified file like a champ, he threw the book at Flagg and told him to start explaining. Flagg told them who she was and how she went rogue.It's really really bad editing but the "squad" doesn't even know the Enchantress exists. Only the audience. We see Waller putting the squad dossiers together, and introducing the Enchantress to the Pentagon but the criminals never met her or knew anything. After the Enchantress goes rogue, they assemble the squad with Flagg in charge to rescue Waller.
None of this was made particularly clear while it was happening tho.