The Servarr Team have retired Readarr due to it’s unusable metadata and basically lack of interest in continuing to develop it. There is a fork called “bookshelf” by other people under active development ( GitHub - pennydreadful/bookshelf: A place for your books. ).
However, there is another book downloader called LazyLibrarian ( LazyLibrarian / LazyLibrarian · GitLab ) which has been around for ages and is still going, and has some features that none of the forks of Readarr have yet implemented (such as direct downloads).
Why not add LL as an alternative service to the dietpi distro? Or alternatively try changing over to the bookshelf fork instead?
Given that readarr is now essentially dead as a project (and, more importantly given the comment on the “bookshelf” fork about some of the work already having been done including the task “Removed servarr analytics spyware”) maybe it’s not a good idea any more to include it in the distro (and possibly look at alternatives to Sonarr, Radarr, Lidarr etc that don’t have links to Servarr analytics spyware as mentioned earlier)?