How many days Google takes to crawl Referlink and Backlink
I saw keywords has been ranked but I am not able to see Refer Link or Backlink; Anyway to check that?
It takes zero days. The very same day it get crawled and within 3 days it gets reflected in the Links section of Google Search Console.
Change in link on a webpage force Google to crawl the page at the earliest.
How it is in SEO, it depends. Unfortunately, I recommend you be patient.
Depends on the site they are linking from. Could be quick like 24 hours and sometimes it takes much more time - specially for smaller sites with lower update frequency. Google typically crawls those websites less often and therefore link discovery takes more time.
I have the same question actually, I created some backlinks but in my SEO tools, they don't seem to appear, how long does it take for Google to spot them?