As for the standard of tier 2 backlinks, you don’t ought to be as stringent as the very first-tier one-way links given that they’re in a roundabout way sending link equity to your site. If you find the back links are yet to get indexed, PING them or Use Quality https://j-w-patrick.weebly.com/blog/web-20-sites-how-to-use-web-20-sites-for-backlinks