Official comment

Hello Antonio,
Per your request, "Brake Pedal On" is a measurement for braking (1) or not braking (0). 1 being your vehicle is slowing down because your foot is on the brake pedal and 0 being your foot off the brake pedal.
You can find this measurement in Engine & Maintenance > Engine & Device > Measurements > Diagnostic type: Brake Pedal On > Apply Changes.
Thank you,
Jenna