The UCs won’t see your actual HS transcript during the application process or what your school “reports”.
Instead, you enter your grades and courses on the application. You include each institution attended: regular HS, online HS, and community college. If you are accepted and decide to enroll, you will send your actual transcripts from all institutions, and the university checks that you entered the grades correctly.
If an AP class is a one semester class, that class would receive 1 honor point. If the class, like AP Stats, is a two semester course, that class would receive 2-honor points. For calculations, it’s 1 extra point for each grade received in an AP or college class up to a maximum of 8.
For example, if you took 3 AP classes first “semester” and 3 AP classes second “semester”, you add 6 honor points for calculations.
When my kids went through the UC application cycles 2014, 2016, 2018, college classes counted twice for fulfilling a-g requirements and grades counted once for GPA calculations.
For example, a semester of Art in community college fulfills the 1-year/2 semester VPA requirement but the grade is counted once in the GPA calculations.
Also the UCs require 4 shorter essay responses. It’s likely you can use a version of your common application essay as one of the responses, but will need to write responses to the prompts.
In addition, from my experience in 2016 and 2018, only UCB looks at LORs. Except not everyone has an opportunity to send. UCB accepts LORs by invitation only. When one son applied in 2016, he was invited to upload a LOR. My other son in 2018 was not invited. Both got in, but are attending another UC.