keyword not ranking

Hello, according to google console, I'm supposed to be ranked for this keyword, but I went through all the pages, and I can't find the site. I could find it a month ago however, and then I got sales coming from organic sale. Now, I haven't got any the past few weeks. Can some expert here...

I am trying to rank an Amazon Affiliate site, i keep building backlinks for 1 of the keyword which is SV 600, low competition Best of keyword, its been a month my keyword just dancing here n there but not moving to above from top 10 position. my site is just 3 months old, Ahrefs shows the...