I have already solved the problem of how to show, in my federated #WordPress blog, a message to invite comments on the posts in #Mastodon.
We need the URLs of the posts of a federated WordPress blog to be recognizable and capable of being found in the search box. The permanent links are not found, but the URL with the native mode ID (www.blogpocket.com/?p=<ID>) is, where <ID> is the identification number of the post.