That looks to be just the Numbers folder in iCloud Drive in Finder with a "New Document" icon, which is odd because I can't find a way to get that.
I guess the question then becomes, how exactly are you getting to that screen / window? What do you do to bring it up?
Also, what happens when you tap the enter key?
If it tries to change the name under the icon, then that indicates its just a file named "New Document" that you are using to create a new Numbers file, but is not really an interface item.
In any case, actually opening the Numbers App, rather than the folder in iCloud Drive, should get you the regular screen Idris shows in her reply.