I’m going to be applying to the CSUs this fall. On the application, do they require that you self report all your scores? For example, I’m currently taking the AP Physics 1 course but I’m not very confident about the exam. If I don’t get a 3 on that exam, will admissions officers wonder why I didn’t self-report that score/will it affect my admissions chances if I don’t self-report that score?
You are not required to report AP scores.
AP scores are not used in the CSU admission process. AP scores are only submitted to the school you end up matriculating for course credit.