How to enable notifications for custom app shortcuts?

Hello I was wondering this I have iphone 16 pro max and I customized my phone by replacing the the app icons with my own custom icons I created bookmarks i think they are called open app shortcut I changed my message app and my phone app but it doesn't show the red notification on the created shortcut it's been a while now and also there's an option on the shortcuts app it's called show notification action is this possible now how do I do it please help

[Re-Titled by Moderator]