Hello,
I have just added site specific google to my website. But when I search
using these, none of my pages get listed? Is it the problem with my
settings or is it waiting for the crawler to crawl? How long will it
take to get listed?

Thanking you

Google site search does not actually search your site. It searchs
Google index for pages from your site. If your pages are not listed in
Google, then they will not be returned.

How long will it take approx to update index for the newly created
webpages?