The FF13 items are on the mogstation. That collab event was years ago, so there's hope the ff15 items might appear for sale as well. However, the Dragonquest, FF11, and Yokai Watch items haven't been released on Mogstation. It might depend on community demand.

There's also a chance the event may be re-released. FF13, Dragonquest, and FF11 events all were available more than once. I think they were recycled during a content drought, although now they seem to be doing moogle tomestones and Gold Saucer bonuses during similar droughts.