Hello, Thanks for sharing your concern, we observed that SFO Airport's  Harvey Milk Terminal 1 B Escalator is available from Level 0 to Level 1 as per the Recent Official website Static Map. So we have created indoor Map Steps lines and attributed proper levels according to what is available on the official website. I am attaching the website link as well for your reference "https://www.flysfo.com/sites/default/files/2023-08/230828_SFO_Tabloid_Face%20A_T1_Web.pdf" 
