Hello,
Thank you for contacting Rank Math and bringing your concern to our attention. I’m sorry for any inconvenience this issue may have caused you.
The Orphan post feature in Rank Math is only available using Rank Math PRO. Could you please confirm if you have purchased it? Currently, the account you have used in this ticket is the free version.
Here’s a link for more information:
https://rankmath.com/kb/bulk-editing-in-rank-math/#orphan-posts
For the incoming links, unfortunately, we only count the incoming links and do not keep a log of where those are coming from. Rank Math only shows the number of Internal, External and Incoming links for each post in the post/page list view on your WordPress dashboard.
In this case, you will have to manually check for internal links pointing to your current post to see which ones are linking to it or use 3rd party tools like Ahrefs to check that.
I hope that helps.
Thank you.