According to the recent Fortnite Chapter 7 leaks from @HYPEX, it would seem that Jinx and VI from Arcane are finally set to return to the Item Shop after 1, 388 days (at the time of writing this).
https://www.sportskeeda.com/fortnite/fortnite-chapter-7-leaks-suggest-arcane-jinx-vi-skins-set-return