So, the CIF Southern Section actually has a pretty great web site where you can find all of the results of their meets:
The divisional prelims in question:
Congratulations to the athletes that have advanced from CIF-SS Divisional Prelims into CIF-SS Track and Field Championship Finals. The 2026 CIF-SS Track
cifss.org
Note that the events in the OP are merely preliminary qualifiers. The finals haven't even happened yet.
In the triple jump, which takes the results from an individual's best performance, the trans girl walloped everybody across all four divisions.
In the long jump, which also displays and individual's best performance, the the trans girl also had the best jump across all divisions, but by a much smaller margin. The cis girls who placed 2nd and 3rd in her division also beat everybody else in the other divisions.
OTOH, the high jump (AFAIK) only increases in height until a sufficient number of people have been eliminated that the leaders can progress to the next round. In the case of D3 (the trans girl's division), that upper bound was 5'2". IOW, five girls from each division move on and only five D3 girls (including the trans girl) managed to clear 5'2", so that's where they stopped. In D2, they stopped at 5'1". However, D1 & D4 stopped at 6'4" and 6'1", respectively. It stands to reason that at least some of the D1 & D4 girls could go even higher than that. Is the trans girl competitive there? We won't know until the finals.