Both of these are related to Tesla removing the ultrasonic sensors and (planning to replace /) replacing them with software functionality based on camera input instead. The proximity alerts were just added a few months ago, so hopefully that should improve rather quickly.
The doors are still our biggest frustration going from a 2016 X to a 2023 X. It is ridiculous that they can actually sell the cars like this, it honestly feels broken, especially when you know how they're supposed to work. Crossing my fingers this will be fixed within the next few months.