You can see all installed apps, including mandatory system apps, in the Settings menu. For each installed app, you can select it to see more information, and manage different settings (where applicable).
Toggle whether or not notifications appear on/off. See how many notifications the app has posted.
See the list of permission allowed or denied to the application.
Storage + Cache
See the app's file size, and delete it from storage or clear its cache.
Under advanced you can manage and see:
See how much of your Magic Leap 2's battery has been used since the device's last full charge.
Open by default
Shows information about what this app opens as the default for. For example, if you look at a web browser app, you may see that it listed as the default Browser app.