Change access to items when iPod touch is locked
By default, some commonly used features (such as Today View and Control Center) are available when iPod touch is locked. (For security, USB connections aren’t allowed when iPod touch is locked.) You can change whether any of these items can be accessed from the Lock screen.
Go to Settings > Passcode, then select your options.
You can turn access on or off to the following features while iPod touch is locked:
Today View (see View and organize Today View on iPod touch)
Recent notifications (see View and respond to notifications on iPod touch)
Control Center (see Use and customize Control Center on iPod touch)
Siri (see Ask Siri on iPod touch)
Home Control (see A look at Home on iPod touch)
Wallet (see Add and manage passes in Wallet on iPod touch)
Returning missed calls (see Make and receive FaceTime calls on iPod touch)
Connecting to a Mac, a Windows PC, or an accessory with USB (such as when you connect iPod touch to your computer using USB)