Why did I not receive the Exalted Frost Ice King Outfit Style in Fortnite?

All eligible Battle Pass owners or Fortnite Crew subscribers that had an active subscription at the end of the season received the Exalted Frost Ice King Outfit Style. 

You can find more information about the eligibility criteria in this news page (Se abre en una nueva pestaña) or this community post (Se abre en una nueva pestaña).