To do that, scroll down and you will find the “Show notifications from these apps” section. If you don’t want to disable all the apps from displaying notifications in the Action Center, then you can manually choose which apps can display the notifications. If you want to disable apps from showing the notifications in the Action Center, then toggle the “Show app notifications” button to “off” under the Notifications section.
After customizing the buttons, you can also customize whether or not apps should display notifications in the action center.