Brake pedal operation does not change with regeneration mode. Depending on brake pressure, regen is first provided, then friction braking after that. You can watch this in real time (if you are careful) by looking at the power gauge. With increasing brake pedal pressure, you will see needle move more and more into the "Charge" portion of the power gauge. When you have pushed hard enough on the brake pedal that you have maxed out the charge (needle pointing horizontally to the left), the friction brakes will engage.
Regen modes only affect how the car slows via regen when your foot is off the brake pedal.
2017 e-Golf LE, Multi Coat White with Black Vegan Leather interior