@ucsctraor1213 you cannot appeal TAG rejections. UCSC is strict about the screened majors. The rule is if not accepted to TAG you roll over to regular admission. That email implies you were also rejected in regular admission. Usually the screened requirements are standard courses. If they know that one you missed was offered nearby or online that would hurt you.
The five courses needed were:
Python
C
Discrete
Calc 1 and 2
Most schools have these, and the math is also offered online.
If you want UCSC you should consider the offer.