I live in San Francisco. Here right now. Cleanup post-pandemic has been gradual. I see nothing special for APEC. Some effort for the holiday season. There is a new skate park that opened in the Civic Center, which is wonderful. Hopefully they will make it into a real sk8er showcase like the one in Barcelona.
Discussion
Perhaps because you do not live in the area that needs a considerable clean up.
https://www.nytimes.com/2023/11/10/us/san-francisco-apec-city-clean.html