Blocking level progression.

Hi, I’m building a game where there is a level select screen, I have built multiple levels that are accessible from that scene, but I only want the levels to become available once they have completed a level, so level 2 is only visible once level 1 has been completed and so on. At the moment I’m not able to hide the levels, meaning that all the levels are available. Thanks for any help that can be provided.

This question is a Duplicate I think.