Why is the Gold Style of the Discotheque Trail locked in Fortnite after I purchased it?

The Gold Style of the Discotheque Trail is exclusive to the Cobal Snowfoot Bundle that can be obtained by purchasing a PS5 console through the promotion.

You can find all the information related to the Cobalt Star Bundle with the PlayStation promotion on our blog: Feel the Chill of Adventure in Fortnite with the PS5® Console – Cobalt Star Bundle! (Opens in a new tab)