How can I add this feature?
Thanks
Wix Blog is a Wix app and you can’t do much with it through code as of yet.
See here for what you can do.
https://support.wix.com/en/corvid-by-wix/wix-blog-with-corvid
https://www.wix.com/corvid/example/related-posts
https://www.wix.com/corvid/example/custom-feed