I want to know whethet it is possible to restrict customers to buy a product from a categorie.

I have the shop set so that products that are not in stock can be ordered.

Now I want to add new products already visible on the website, but customers may not order them.

Is this possible to adapt the code that ensures that customers can still order if the product is not in stock?

Or is there another way to do it they get ?

If i create a visual product then has this no effect.