The FBI never said who the missing person is. SWORD didn’t tell them about Vision being gone so I think that’s the real mystery. Also on the list of people and identities, I found it peculiar two people were not on the board...Dottie who was a major part of episode 2. They identified Beverly and Herb from the 60s episode.
Also, Dottie alluded first to knowing Wanda and vision didn’t belong. Even more so than Agnes.
There’s something about Dottie.