Enabling Pilot Assist and Adaptive Cruise Control

[IMAY2023]

By design, the ACC / PA deactivates after being stand still for more than about 5 seconds. If the car is stopped less than that, it resumes automatically. 
To resume ACC/ PA after stopping more than 5 seconds, you will need to gently press on the gas pedal or use the resume button on the steering wheel. There is no configuration to disable or extend that 5 second duration.   

Since you mentioned   2024 Polestar 2, you should have creeping mode.