2025 Prius plug in hybrid- can’t figure how to turn off or reduce assist parking. Duh. I turned it on but now I don’t want it on with the maximum's distance setting.
Regen braking level? Look under the main menu options for vehicle settings. I think Level 3 is most and level 1 is least
Tough to tell what the OP meant. The feature that Toyota calls Brake Assist is one that detects when you've gone on the brake pedal extra fast, and then it power-assists the brakes extra hard. But the first post also reads as if the OP could be thinking about adaptive cruise control or collision avoidance, slowing or stopping the car when there is something within a certain distance ahead.
I already replied to you in another thread that the automatic emergency-braking distance for the ultrasonic parking assist cannot be adjusted. You can only adjust the warning distance.