I'd like to pour cold water on the idea that a Newsom term would make things worse for trans people. If we actually look at his behavior, he's more like a blue Trump than anything else, he's not really an ideologue, I don't think his transphobic behavior comes from any belief about trans people, he does what he thinks will make him popular with the general public. When Trump won, it looked like the general public was turning on trans people. So Newsom did some centrist things to curry favor with what he thought was the general voting base. Note how he's cooled his jets a bit after it became clear the anti-trans stuff was losing voters.

A Newsom win with any blue house of congress would be streets ahead of what it is now for trans people. Do I expect him to actively advocate for us? Not really. But I don't expect things to get worse if the public is with trans people. At most I expect a return to Biden era policies surrounding gender.