The System Administrator Profile Automatically Gets the App Launcher

Administrators with the System Administrator profile have access to the App Launcher without requesting permission from Salesforce.
Available in: Enterprise, Performance, Unlimited, and Developer Editions

System administrators using the System Administrator profile in an edition that supports the App Launcher will see the App Launcher in their drop-down app menu without any setup required, even for organizations created in earlier releases. This does not apply to Administrators using profiles cloned from the System Administrator profile.

For more information, see “Using the App Launcher” in the online help, or the Salesforce Identity Implementation Guide.