How can i return my map in creative until i unarchived it
If I recall correctly when you archive a map it loses its star in the content service portal.
You most likely need to just re-star it in the content-service and you will re-gain access to your map inside Fortnite Creative.
Here’s the content service link: https://content-service.bfda.live.use1a.on.epicgames.com/
Firstly Un-Archive your map before going to the content service.
Inside there you should be able to see all of your projects, it should look something like the picture below, try to find your project and just click the star button.
Afterwards restart the Fortnite Client and see if you can now get access to your Island in Fortnite Creative