Before you go select the brand. 2&3 you have listed are normally basic stuff in a dash cam.
You should understand more about the parking mode. Many consumers thought it will be keep recording under the parking mode. However, it is just a fantasy as it depend on the battery consumption of your vehicle.
First of all, dash cam will be switch off after your car engine is off. hereby the parking mode will be best if it is functioning with the motion detector, any motion detected will be causing the dash cam to record. If your battery is nearly 99% new, take an example of purchasing a new car. It may have more battery usage to supply the power to your dash cam. Sometimes it will drain all of your car battery and that's why you need function like low voltage cutoff in order to avoid battery draining as you set the voltage to 12.3-1, stop supplying power to the dash cam.
The duration of parking mode really depends on the traffic. If you parked the car in underground, then it should be last for a night. If you parked the car in a busy traffic street many cars and pedestrians crossing, it may last for only few hours.
Second, SD cards are important too, some consumers are willing to store and watch the videos in few days so they need bigger capacity like 256 GB. Better find class 10 SD like samsung but not Sandisk.
Sometimes people think they have a new car so their battery is cool to go. However, new car doesn't mean the car battery is fully new as the stock has been placed somewhere without starting the car engine, voltage may have drop down if the location is very cold. Better to check out your car battery before installing a dash cam.