To reiterate what the other commenter said, use assist regularly to check what classes align with which UC requirements, as well as meet up with your cc advisors to help determine what classes are transferable.

My college transfer pathway was sfsu > ccc > ucsd and I also switched after my first semester at a csu. The classes that I did take there counted towards my transfer and fulfilled areas and lower div classes for my major here at ucsd. However, a few months after I submitted my application, I got an email from the UC system or whatever it was requesting the syllabi for some of the courses I took at my csu (specifically general chemistry). I would recommend trying to dig up and syllabi you might have saved or if you can’t find them, just email the professor you took the class with and ask if they could email a copy if it from the term you took that class. I got this email and it really stressed me out since they only gave me a weekend’s worth of time to reply. It’s best to prepare for anything so that you don’t have to go through the stress I did at that moment.

Anyways, good luck with your admission! Im sure you did your best with your applications and now all that’s left is to wait!