There is a good article about it from about 2 months ago:
https://www.cnn.com/2023/07/11/us/california-homeless-spending/index.html
Some of the issues mentioned that the state does is trying to force local communities to build more affordable housing, the fact that some people do not want to accept the free housing, again, leaders need to ensure to make the resources available for the solutions and continuously work for it. Again, anyone that says it is an easy thing to do in 5 years, where 3 of them also including a global pandemic is, imho, out of their depth. I can judge Newsom on what he has done with what he has so far, and to me at least, it seems like his heart is in the right place (can't say that for most politicians) and he is actually doing the legwork.
I do not believe this will be solved within 4, 8 or 10 years honestly - the systems in the US are just too cumbersome for it. But, I believe I once heard him say that success is not a place, it's a trend. This, I believe in.