You can change the Availability of a product, and to do so just open the right menu within the product (by clicking on the blue arrow in the top right), and reach the section Availability.
It will be possible from here to determine if the product in question is:
- Available: then sold by the customers.
- Not available: therefore, not available for purchase by customers.
- Availability request: the client may not purchase the product directly, but only ask for the availability.