How to index backlink sites to Google?
 

Google has stopped the service of indexing backlinks manually using search console. Now only our owned sites can index through search console. If there is any other option to submit backlinks to google? Any seo tools available for this?

Generally, a link from high-quality sites takes 5-7 days to index automatically.

If still, you want your link get cache quickly you can promote your link on social media channels.

Hope this will help you.

As per me, follow few instruction like create web 2.0 sites and linked your all external backlinks in it.

There isn't any tool for indexing backlinks. But you can share your URLs in various social profiles to increase the crawling frequency of your webpages.