2019 Kia Optima Seat Belts Problems

I just think theres some sort of a tech issue with my electronic dashboard. My passenger seatbelt sign goes on and beeps incessantly when there is no passenger in the seat. My caution alert button comes on saying I have low tire pressure when it’s only one number less than all the other tires. My oil change reminder never comes on. Today I was driving normally and the car in front of me barely tapped their breaks (and I was not close to them at all) and the collision alert started beeping. My car randomly gets cold and the AC smells like it’s on, but it’s not (the button isn't lit nor did I turn it on) It normally doesn’t allow me to turn the outside air button on/off. Like in the winter when it’s freezing outside and I wasn’t to press the button to only circulate the inside air in the car, it doesn’t allow me and I have to freeze and be uncomfortable in my own car.