I think I likely know more about urban poverty than you do. It is incredibly hard to get a section 8 apartment, especially if you aren't a family, and it is becoming increasingly difficult to do that in urban cores as section 8 contracts are being shifted towards outlying areas.

Nonetheless, there are lots of people in urban areas living in section 8 housing and it is a substantial part of the story around urban poverty and how people still afford to live in urban cores.