Hello in admin in product_settings
 
I mark:
 
New Product Settings
 
Sort Order : date
"NEW!" should be shown on products that have been added
Days: last month
 
but never show in product the mark NEW , is a bug ???
 
thanks

Where is the New Product Settings ?

I see it, its a new feature in 3.4.7.
 
You are right, this does not work. Maybe, its a bug