Output menu item extension

Hello,

I have created my model linked to the "Application suite", where the output menu item is located which I want to modify (extension).

When I do "Create extension", I still cannot modify any property of it. 

Do I miss something or it's not possible to modify any output menu items?

The case is that menu item is restricted to certain "CountryRegionCodes" and we need it to be accessible from all entities.

Thanks.