The number of backlinks that shows in the SERP overview is just the number of backlinks that point to the current version of the site. This is misleading. A site with 500 backlinks to the http version of the page may only show 3 backlinks if they just switched to https. It would be great to show the total number of links and RDs in the SERP.
How are we expected to check the competition when the backlink data is not correct?