obviously those ones aren't, because as you've said they exist in-game. but the others? still no word, so neither you nor I know if they are actually available, and simply extremely rare, or are situationaly unlocked, like spindle was (an exotic no body had any idea about, btw) and nobodys figured it out yet, or if it is indeed time-gated, OR if its just unfinished and/or not scheduled to be released. we've all known about FoAF for a really long time, but that doesnt mean its "time-gated" or "locked content that we paid for", its just not available yet.