Brake pedal issue is "normal". Or should I say common. Don't worry about it. My 2019 also does it on occasion.
Coolant issue is odd considering age of car. If it wasn't filled properly from new, it surely would have showed this warning before. And the turbo burning coolant? I'd say if it is there's another issue causing it. Ask dealer to check the heater hose TIB listed here.
https://www.aboutautomobile.com/Tech...Engine-Cooling
Passenger restraint issue is likely in need of the passenger seat harness fix. There's a bulletin for it.
Driver Assist issue is hopefully just a software update. Ask dealer to check your iStep level and upgrade your car to latest. BTW, with lane keep assist on, on many roads the car tends to wander. It's just ok, not a great implentation. Let's say it's V1.