How to edit the online store product availability
Usually, it is a positive problem to be fully booked. Still, sometimes it is justified to limit the product availability in the online store to avoid situations where you cannot serve walk-in customers due to high demand.
To define a specific capacity to the online store, go to Products > [the product which capacity you want to limit] > Settings and scroll down to the Advanced settings section to define the product's availability in your online store. Define the percentage of the total stock amount that you want to keep bookable through your online store., click save, and you're done!
Here are the instructions on how to hide products completely in certain sales channels.