Steps
1.From the admin app, click on ” Settings” of Back-in-stock feature
2.Click on ” Back-in-stock”
3.Click on “Conditions”
4.Scroll to ” Hide button/form with products”
5.Add the tags of the products that you want to hide the BIS button on
6.Or select the product collection that you want to hide the BIS button
7.Click “ Save” to update the change