BuzzKill is the app that will let you see all your notifications in one place, and filter them to only see the ones you want to. It's super simple and super fast.

The first thing you need to do is download it from the Play Store. Once you have it installed, you need to create a new rule. This can be done by clicking on the "Add" button in the main menu of the app.

After that, you need to choose the notification that you want to see. You can see all of them or just the ones from a specific app.

You can also add a notification that will appear on your lock screen.