Local I/O is only available for the Iron Pi, and will not be displayed on 3rd party devices.
The Iron Pi provides 8 input/output channels. Only the first four may be configured as analog inputs, but all may be configured as digital inputs or outputs:
Channels
Analog Input
Digital Input
Digital Output
Channels 1-4
✅
✅
✅
Channels 5-8
❌
✅
✅
On devices that support Local I/O, you'll see a LOCAL I/O section in the sidebar:
Click on one of the channels in the sidebar to edit it. You'll see this view: