@rasterweb @mathias @requiem I don't think any feed readers look at sitemap.xml. A reasonable implementation of the sitemap protocol should list all the pages on your site, and should break the list across multiple files, but that's only to tell search engines what you have rather than waiting for them to discover it all by crawling. (And these days there's a reasonable question to ask about whether you even want that.)

An RSS feed has a different purpose, and paginating it has different requirements and works differently. I did write a WordPress plugin for that (https://github.com/jameysharp/wp-fullhistory) though I'm not an experienced WordPress or PHP developer so all I can say is it seems to work 😅