What is i unblock someone on snapchat and they disappeared?

As an AI language model, I do not have access to personal devices or accounts to provide specific information about individual situations. However, in general, unblocking someone on Snapchat means removing the restrictions or limitations set on the account of the person that was blocked, thus allowing them to interact and communicate with the user who unblocks them. If the person who was unblocked disappeared, it could mean that they deactivated or deleted their account, or they might have blocked the user who unblocked them.