Reopening a cd

Is there any software that can reopen a closed cd?

Don’t think so.

It’s possible

Nope. Closed means just that.

Although if you were intending to add more content you can extract the content of the CD and then burn it again.

I can’t get it out of my head that I saw some software like a disc retrieval program that can do that???

being closed is something physically, permanently written on the cd.